/* ==========================================================================
   Components

   Organised by layer:
     1. Primitives   — buttons, chips, badges, cards, rules
     2. Chrome       — navigation, header controls, footer
     3. Sections     — hero, about, projects, skills, journey, education,
                       credentials, contact
     4. Project page — detail-only composition
   ========================================================================== */


/* ==========================================================================
   1. PRIMITIVES
   ========================================================================== */

/* --- Buttons ------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.7rem 1.35rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.01em;
    line-height: 1.2;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

.btn:active {
    transform: translateY(1px);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.btn-primary {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-on-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: var(--color-on-accent);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background-color: var(--color-surface-elevated);
    border-color: var(--color-border-strong);
    color: var(--color-text-primary);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border-strong);
    color: var(--color-text-primary);
}

.btn-outline:hover {
    background-color: var(--color-accent-soft);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-ghost {
    background-color: transparent;
    border-color: transparent;
    color: var(--color-text-secondary);
    padding-inline: var(--space-3);
}

.btn-ghost:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-text-primary);
}

/* --- Inline links -------------------------------------------------------- */
.link {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 0.2em;
    transition: color var(--transition-fast);
}

.link:hover {
    color: var(--color-accent-hover);
}

/* An arrow link: understated, and the arrow nudges on hover. */
.arrow-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.arrow-link::after {
    content: "\2192";
    transition: transform var(--transition-fast) var(--ease-out);
}

.arrow-link:hover {
    color: var(--color-accent);
}

.arrow-link:hover::after {
    transform: translateX(3px);
}

/* --- Eyebrow: the mono, tracked-out label above section titles ---------- */
.eyebrow {
    display: inline-block;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-accent);
}

/* --- Badges -------------------------------------------------------------- */
.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--color-accent);
    color: var(--color-on-accent);
}

.badge-secondary {
    background-color: var(--color-bg-alt);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success-fg);
}

.badge-error {
    background-color: var(--color-error-bg);
    color: var(--color-error-fg);
}

/* --- Tech chip ----------------------------------------------------------- */
.tech-badge {
    display: inline-block;
    padding: 0.28rem 0.65rem;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1.4;
    color: var(--color-text-secondary);
    background-color: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    white-space: nowrap;
}

/* --- Cards --------------------------------------------------------------- */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition:
        border-color var(--transition-normal),
        box-shadow var(--transition-normal),
        transform var(--transition-normal) var(--ease-out);
}

.card-header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-border);
}

.card-body {
    padding: var(--space-5);
}

.card-footer {
    padding: var(--space-5);
    border-top: 1px solid var(--color-border);
}

/* --- Status dot ---------------------------------------------------------- */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.status-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-pill);
    flex-shrink: 0;
    background-color: var(--color-text-muted);
}

.status-dot-success { background-color: var(--color-success); }
.status-dot-error   { background-color: var(--color-error); }
.status-dot-warning { background-color: var(--color-warning); }
.status-dot-info    { background-color: var(--color-info); }

/* --- Code ---------------------------------------------------------------- */
.code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    padding: 0.1em 0.35em;
    background-color: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.pre {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    padding: var(--space-4);
    overflow-x: auto;
    background-color: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

/* --- Lists --------------------------------------------------------------- */
.list-unstyled {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.list-inline {
    list-style: none;
    padding-left: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}


/* ==========================================================================
   2. CHROME — navigation and footer
   ========================================================================== */

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: var(--header-height);
    width: 100%;
    max-width: var(--layout-max-width);
    margin-inline: auto;
    padding-inline: var(--layout-page-padding);
}

/* --- Wordmark ------------------------------------------------------------ */
.nav-logo {
    display: inline-flex;
    align-items: baseline;
    gap: 0.45rem;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--color-text-primary);
    text-decoration: none;
    white-space: nowrap;
}

.nav-logo::before {
    content: "";
    width: 0.55rem;
    height: 0.55rem;
    border-radius: var(--radius-sm);
    background-color: var(--color-accent);
    transform: rotate(45deg);
    transition: transform var(--transition-normal) var(--ease-out);
}

.nav-logo:hover {
    color: var(--color-text-primary);
}

.nav-logo:hover::before {
    transform: rotate(135deg);
}

.nav-logo-role {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-muted);
}

/* --- Menu ---------------------------------------------------------------- */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    position: relative;
    padding: 0.45rem 0.7rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-alt);
}

/* Set by the scroll spy in navigation.js as each section comes into view. */
.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    left: 0.7rem;
    right: 0.7rem;
    bottom: 0.15rem;
    height: 2px;
    border-radius: var(--radius-pill);
    background-color: var(--color-accent);
}

/* --- Header controls ----------------------------------------------------- */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    color: var(--color-text-secondary);
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background-color: var(--color-accent-soft);
}

.theme-toggle svg {
    width: 1.05rem;
    height: 1.05rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Only one of the two glyphs is shown, chosen by the resolved theme. */
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

/* --- Mobile toggle ------------------------------------------------------- */
.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
    display: block;
    width: 1.05rem;
    height: 1.5px;
    border-radius: var(--radius-pill);
    background-color: var(--color-text-primary);
    transition: transform var(--transition-normal) var(--ease-out), opacity var(--transition-fast);
}

.nav-toggle-icon {
    position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
}

.nav-toggle-icon::before { top: -0.34rem; }
.nav-toggle-icon::after  { top: 0.34rem; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
    background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

/* --- Footer -------------------------------------------------------------- */
.site-footer {
    /* No margin-top: every section already carries its own bottom padding,
       and stacking the two left a ~14rem dead band above the footer. */
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
}

.footer-content {
    display: grid;
    gap: var(--space-6);
    padding-block: var(--space-8) var(--space-6);
    width: 100%;
    max-width: var(--layout-max-width);
    margin-inline: auto;
    padding-inline: var(--layout-page-padding);
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-6);
}

.footer-identity {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--color-text-primary);
}

.footer-tagline {
    margin: 0;
    max-width: 42ch;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
}

.footer-link {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 0.25em;
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border);
}

.footer-copyright,
.footer-colophon {
    margin: 0;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}


/* ==========================================================================
   3. SECTIONS
   ========================================================================== */

.section {
    padding-block: var(--layout-section-spacing);
    scroll-margin-top: var(--header-height);
}

/* Alternating grounds give the page vertical rhythm without extra markup. */
.section-tinted {
    background-color: var(--color-bg-secondary);
    border-block: 1px solid var(--color-rule);
}

/* --- Section header ------------------------------------------------------ */
.section-head {
    display: grid;
    gap: var(--space-3);
    max-width: 62ch;
    margin-bottom: var(--space-8);
}

.section-title {
    margin: 0;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--color-text-primary);
}

.section-lede {
    margin: 0;
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

/* --- Hero ---------------------------------------------------------------- */
.hero {
    position: relative;
    padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(3.5rem, 8vw, 6rem);
    overflow: hidden;
}

/* A faint engineering grid behind the hero. Purely decorative, so it is
   painted on a pseudo-element and fades out before the content below. */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, var(--color-grid-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--color-grid-line) 1px, transparent 1px);
    background-size: 3.5rem 3.5rem;
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    display: grid;
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: center;
}

@media (min-width: 900px) {
    .hero-grid {
        grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    }
}

.hero-content {
    display: grid;
    gap: var(--space-5);
    justify-items: start;
}

/* Availability pill */
.hero-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.3rem 0.8rem 0.3rem 0.55rem;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.04em;
    color: var(--color-success-fg);
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    border-radius: var(--radius-pill);
}

.hero-status-dot {
    width: 0.45rem;
    height: 0.45rem;
    border-radius: var(--radius-pill);
    background-color: var(--color-success);
    box-shadow: 0 0 0 3px var(--color-glow);
}

.hero-eyebrow {
    margin: 0;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-accent);
}

.hero-title {
    margin: 0;
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
}

.hero-description {
    margin: 0;
    max-width: 52ch;
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    text-wrap: pretty;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

.hero-tech {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.hero-tech-label {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-right: var(--space-1);
}

/* --- Hero side panel: the "at a glance" card ---------------------------- */
.hero-panel {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.hero-panel-head {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background-color: var(--color-surface-sunken);
    border-bottom: 1px solid var(--color-border);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.hero-panel-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-pill);
    background-color: var(--color-border-strong);
}

.hero-panel-body {
    display: grid;
    gap: 0;
}

.hero-fact {
    display: grid;
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: var(--space-4);
    align-items: baseline;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-rule);
}

.hero-fact:last-child {
    border-bottom: none;
}

.hero-fact-key {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.hero-fact-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    overflow-wrap: anywhere;
}

.hero-fact-value a {
    color: var(--color-text-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border-strong);
}

.hero-fact-value a:hover {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface-sunken);
}

.hero-stat {
    padding: var(--space-4) var(--space-3);
    text-align: center;
    border-right: 1px solid var(--color-rule);
}

.hero-stat:last-child {
    border-right: none;
}

.hero-stat-value {
    display: block;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    line-height: 1.1;
}

.hero-stat-label {
    display: block;
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
}

/* --- About --------------------------------------------------------------- */
.about-layout {
    display: grid;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
}

@media (min-width: 900px) {
    .about-layout {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }
}

.about-intro {
    margin: 0 0 var(--space-4);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.about-intro:last-child {
    margin-bottom: 0;
}

.about-highlights {
    display: grid;
    gap: var(--space-4);
}

/* Stacked, not a grid: three items in a two-up grid always orphaned one. */
.highlight-item {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-1) var(--space-4);
    padding: var(--space-5);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-normal), transform var(--transition-normal) var(--ease-out);
}

.highlight-item:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.highlight-index {
    grid-row: span 2;
    padding-top: 0.2rem;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-label);
    color: var(--color-accent);
}

.highlight-title {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.highlight-description {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

/* --- Projects ------------------------------------------------------------ */
.projects-grid {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
}

.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.project-card:hover,
.project-card:focus-within {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

/* Fixed ratio so a row of cards lines up regardless of screenshot size. */
.project-image {
    position: relative;
    margin: 0;
    aspect-ratio: 16 / 9;
    background-color: var(--color-surface-sunken);
    border-bottom: 1px solid var(--color-border);
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
    transition: transform var(--transition-slow) var(--ease-out);
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

/* Placeholder when a project has no screenshot: the grid motif from the
   hero, so an image-less card still looks intentional. */
.project-image-fallback {
    display: grid;
    place-items: center;
    background-color: var(--color-surface-sunken);
    background-image:
        linear-gradient(to right, var(--color-grid-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--color-grid-line) 1px, transparent 1px);
    background-size: 1.75rem 1.75rem;
}

.project-image-fallback span {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
}

.project-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: var(--space-3);
    padding: var(--space-5);
}

.project-card-header {
    display: grid;
    gap: var(--space-2);
}

.project-type-badge,
.project-detail-type-badge {
    display: inline-block;
    width: fit-content;
    padding: 0.2rem 0.55rem;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-accent);
    background-color: var(--color-accent-soft);
    border-radius: var(--radius-sm);
}

.project-title {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-snug);
    letter-spacing: var(--letter-spacing-tight);
}

.project-title-link {
    color: var(--color-text-primary);
    text-decoration: none;
}

/* Stretch the title's hit area over the whole card, so the card reads as
   one target while the nested action links keep their own. */
.project-title-link::after {
    content: "";
    position: absolute;
    inset: 0;
}

.project-title-link:hover {
    color: var(--color-accent);
}

.project-description,
.project-detail-summary {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
    margin: var(--space-1) 0 0;
    padding: 0;
}

.project-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    margin-top: auto;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-rule);
}

.project-action-link,
.project-breadcrumb-link {
    position: relative;
    z-index: 1;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.project-action-link:hover,
.project-breadcrumb-link:hover {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 0.25em;
}

/* --- Empty states (shared shape) ----------------------------------------- */
.projects-empty,
.education-empty,
.certifications-empty,
.professional-skills-empty,
.journey-empty {
    display: grid;
    gap: var(--space-4);
    justify-items: start;
    padding: var(--space-8) var(--space-6);
    background-color: var(--color-surface);
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-lg);
}

.projects-empty-text,
.education-empty-text,
.certifications-empty-text,
.professional-skills-empty-text,
.journey-empty-text {
    margin: 0;
    color: var(--color-text-muted);
}

/* --- Skills -------------------------------------------------------------- */
.skills-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding: var(--space-3) var(--space-4);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.skills-legend-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.skills-grouped {
    display: grid;
    gap: var(--space-7);
}

/* Multi-column rather than a two-column grid: a grid ties each pair of
   groups to a shared row height, so a short group (Frontend) left a hole
   beneath it. Columns flow and self-balance instead. */
@media (min-width: 900px) {
    .skills-grouped {
        display: block;
        column-count: 2;
        column-gap: var(--space-8);
    }

    .skills-group {
        break-inside: avoid;
        margin-bottom: var(--space-7);
    }
}

.skills-group-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0 0 var(--space-4);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.skills-group-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background-color: var(--color-border);
}

/* Skills are chips, not cards: 36 of them have to stay scannable. */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.skill-card {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.4rem 0.75rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.skill-card:hover {
    border-color: var(--color-accent);
    background-color: var(--color-accent-softer);
}

.skill-content {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.skill-name {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

/* Proficiency reads as a dot plus a screen-reader label, so the wall of
   chips is not also a wall of text badges. */
.skill-status {
    display: inline-flex;
    align-items: center;
    width: 0.45rem;
    height: 0.45rem;
    padding: 0;
    border-radius: var(--radius-pill);
    overflow: hidden;
    text-indent: -999em;
    flex-shrink: 0;
}

.skill-status.badge-used-in-projects,
.skills-legend-dot.is-used { background-color: var(--color-accent); }

.skill-status.badge-building-with,
.skills-legend-dot.is-building { background-color: var(--color-highlight); }

.skill-status.badge-learning,
.skills-legend-dot.is-learning { background-color: var(--color-border-strong); }

.skills-legend-dot {
    width: 0.45rem;
    height: 0.45rem;
    border-radius: var(--radius-pill);
    flex-shrink: 0;
}

/* --- Journey timeline ---------------------------------------------------- */
.timeline {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0 0 0 var(--space-6);
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0.28rem;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 1px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-6);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: calc(-1 * var(--space-6));
    top: 0.5rem;
    width: 0.6rem;
    height: 0.6rem;
    border-radius: var(--radius-pill);
    background-color: var(--color-bg);
    border: 2px solid var(--color-accent);
}

.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.timeline-date {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
}

.timeline-title {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.timeline-description {
    margin: 0;
    max-width: 62ch;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

/* --- Credentials: education, certifications, professional skills --------- */
.credentials-layout {
    display: grid;
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: start;
}

@media (min-width: 900px) {
    .credentials-layout {
        grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    }
}

.credentials-column-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0 0 var(--space-5);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.credentials-column-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background-color: var(--color-border);
}

.credentials-block + .credentials-block {
    margin-top: var(--space-8);
}

.education-cards {
    display: grid;
    gap: var(--space-4);
    /* Capped rather than full-bleed: the content is short, and a 1120px-wide
       card leaves a single line of text stranded across the viewport. */
    max-width: 52rem;
}

.education-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.education-card .card-body {
    display: grid;
    gap: var(--space-2);
    padding: var(--space-5);
}

.education-date {
    order: -1;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: 0.04em;
    color: var(--color-accent);
}

.education-degree {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-snug);
    color: var(--color-text-primary);
}

.education-institution {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

.education-field {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.education-description {
    margin-top: var(--space-2);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-rule);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.education-description p {
    margin-bottom: var(--space-2);
}

.education-description p:last-child {
    margin-bottom: 0;
}

.certifications-list {
    display: grid;
    gap: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    overflow: hidden;
}

.certification-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-rule);
}

.certification-item:last-child {
    border-bottom: none;
}

.certification-name {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.certification-issuer {
    margin: var(--space-1) 0 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.certification-date {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.certification-link {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    text-decoration: none;
    white-space: nowrap;
}

.certification-link:hover {
    text-decoration: underline;
    text-underline-offset: 0.25em;
}

.professional-skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.professional-skill-item {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
}

/* --- Contact ------------------------------------------------------------- */
.contact-layout {
    display: grid;
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: start;
}

@media (min-width: 900px) {
    .contact-layout {
        grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    }
}

.contact-intro {
    margin: 0 0 var(--space-6);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.contact-channels {
    display: grid;
    gap: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    overflow: hidden;
}

.contact-channel {
    display: grid;
    gap: var(--space-1);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-rule);
    text-decoration: none;
}

.contact-channel:last-child {
    border-bottom: none;
}

.contact-channel:hover {
    background-color: var(--color-accent-softer);
}

.contact-channel-label {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.contact-channel-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    overflow-wrap: anywhere;
}

.contact-channel:hover .contact-channel-value {
    color: var(--color-accent);
}

/* --- Alerts -------------------------------------------------------------- */
.messages {
    display: grid;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.alert {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.alert-success {
    background-color: var(--color-success-bg);
    border-color: var(--color-success-border);
    color: var(--color-success-fg);
}

.alert-error {
    background-color: var(--color-error-bg);
    border-color: var(--color-error-border);
    color: var(--color-error-fg);
}

.alert-close {
    flex-shrink: 0;
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    line-height: 1;
    font-size: var(--font-size-lg);
    color: inherit;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0.65;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* --- Contact form -------------------------------------------------------- */
.contact-form {
    display: grid;
    gap: var(--space-5);
    padding: clamp(1.5rem, 4vw, 2.25rem);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.form-group {
    display: grid;
    gap: var(--space-2);
}

/* Name and email share a row once there is room for two columns. */
@media (min-width: 640px) {
    .contact-form-row {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--space-5);
    }
}

.form-label {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.form-required {
    color: var(--color-error);
    margin-left: 0.15em;
}

.contact-form .form-control {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.contact-form .form-control:focus {
    border-color: var(--color-accent);
    box-shadow: var(--focus-ring);
}

.contact-form .form-control::placeholder {
    color: var(--color-text-muted);
}

.contact-form textarea.form-control {
    min-height: 9rem;
    resize: vertical;
}

/* The honeypot field: hidden from people, reachable by naive bots. It is not
   display:none, because some bots skip fields that are not rendered. */
.form-trap {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-error);
}

.form-error p {
    margin: 0;
}

.form-error p + p {
    margin-top: var(--space-1);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
}

.form-note {
    margin: 0;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}


/* ==========================================================================
   4. PROJECT DETAIL PAGE
   ========================================================================== */

.project-detail {
    padding-block: var(--space-8) var(--space-9);
}

.project-breadcrumb {
    margin-bottom: var(--space-6);
}

.project-detail-header {
    display: grid;
    gap: var(--space-4);
    justify-items: start;
    max-width: 62ch;
    margin-bottom: var(--space-7);
}

.project-detail-title {
    margin: 0;
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.025em;
    color: var(--color-text-primary);
}

.project-detail-summary {
    font-size: var(--font-size-lg);
}

.project-detail-image {
    margin: 0 0 var(--space-8);
    aspect-ratio: 16 / 9;
    background-color: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.project-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.project-detail-layout {
    display: grid;
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: start;
}

@media (min-width: 900px) {
    .project-detail-layout {
        grid-template-columns: minmax(0, 1fr) 17rem;
    }
}

.project-detail-section + .project-detail-section {
    margin-top: var(--space-7);
}

.project-detail-section h2 {
    margin: 0 0 var(--space-4);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.project-detail-description {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    max-width: 68ch;
}

.project-detail-description p {
    margin-bottom: var(--space-4);
}

.project-detail-description p:last-child {
    margin-bottom: 0;
}

.project-detail-sidebar {
    padding: var(--space-5);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    position: sticky;
    top: calc(var(--header-height) + var(--space-4));
}

.project-detail-actions {
    display: grid;
    gap: var(--space-3);
}

.project-links-unavailable {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}


/* ==========================================================================
   5. ERROR PAGES
   ========================================================================== */

.error-page {
    display: grid;
    gap: var(--space-4);
    justify-items: start;
    padding-block: var(--space-8);
}

/* Separator between the role and the tagline in the hero eyebrow. */
.hero-eyebrow-sep {
    color: var(--color-text-muted);
    margin-inline: 0.15rem;
}