/* ==========================================================================
   Components — header and navigation, buttons, chips, project cards, form,
   alerts and footer. Page sections live in sections.css.
   ========================================================================== */

/* --- Header -------------------------------------------------------------
   Always a dark bar (stage tokens), in both themes. Over a stage hero it is
   transparent until the page scrolls. */
.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: var(--z-header);
    height: var(--header-height);
    background: var(--color-stage-translucent);
    border-bottom: var(--border-width) solid var(--color-stage-border);
    transition: transform var(--dur-base) var(--ease-out), background-color var(--dur-base) ease, border-color var(--dur-base) ease;
}

/* Only navigation.js adds .is-stuck, so without scripts the header stays a
   solid bar rather than floating transparently over body copy. */
.js .has-stage-hero .site-header:not(.is-stuck) {
    background: transparent;
    border-bottom-color: transparent;
}

.site-header.is-hidden {
    transform: translateY(-100%);
}

/* Keyboard focus inside the header always brings it back. */
.site-header:focus-within {
    transform: none;
}

/* The light theme's page red is too dark on the stage (about 1.8:1), so
   focus rings on the stage use the stage red. */
:is(.site-header, .hero, .project-detail-hero) :focus-visible {
    outline-color: var(--color-stage-accent);
}

:is(.site-header, .hero, .project-detail-hero) .btn-primary:focus-visible,
.btn-primary:focus-visible {
    outline-color: var(--color-on-accent);
    box-shadow: 0 0 0 6px var(--color-accent-fill);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    height: 100%;
    max-width: var(--shell-max);
    margin-inline: auto;
    padding-inline: var(--shell-pad);
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    white-space: nowrap;
    text-decoration: none;
    color: var(--color-on-stage);
}

.nav-logo:hover {
    color: var(--color-on-stage);
}

.nav-logo-role {
    color: var(--color-on-stage-muted);
}

.nav-logo-role::before {
    content: " / ";
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2vw, 2rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-link {
    position: relative;
    padding-block: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-on-stage-secondary);
    transition: color var(--dur-fast) ease;
}

.nav-link::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: var(--border-width);
    background: var(--color-stage-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur-base) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-on-stage);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

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

.nav-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--color-stage-accent);
}

.nav-status-dot {
    width: 6px;
    height: 6px;
    flex: none;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 4px var(--color-accent-glow);
}

.theme-toggle,
.nav-toggle {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: var(--border-width) solid var(--color-stage-border);
    border-radius: 50%;
    color: var(--color-on-stage);
    cursor: pointer;
    transition: border-color var(--dur-fast) ease, color var(--dur-fast) ease;
}

.theme-toggle:hover,
.nav-toggle:hover {
    border-color: var(--color-stage-accent);
    color: var(--color-stage-accent);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
}

/* The icon shows the theme the button switches *to*. */
.theme-toggle .icon-moon,
:root[data-theme="light"] .theme-toggle .icon-sun {
    display: none;
}

:root[data-theme="light"] .theme-toggle .icon-moon {
    display: block;
}

.nav-toggle {
    display: none;
    width: auto;
    gap: var(--space-2);
    padding-inline: var(--space-4);
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
}

.nav-toggle-label {
    line-height: 1;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
    display: block;
    width: 16px;
    height: 1.5px;
    background: currentColor;
    transition: transform var(--dur-base) var(--ease-out), background-color var(--dur-fast) ease;
}

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

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

.nav-toggle-icon::before {
    top: -5px;
}

.nav-toggle-icon::after {
    top: 5px;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    transform: translateY(-5px) rotate(-45deg);
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    min-height: 48px;
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    text-decoration: none;
    border: var(--border-width) solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease, border-color var(--dur-fast) ease, transform var(--dur-fast) ease;
}

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

.btn .icon {
    transition: transform var(--dur-base) var(--ease-out);
}

.btn:hover .icon {
    transform: translateX(4px);
}

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

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

.btn-outline {
    border-color: var(--color-accent);
    color: var(--color-text-primary);
}

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

.btn-ghost {
    padding-inline: 0;
    color: var(--color-text-secondary);
}

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

/* --- Chips and badges ----------------------------------------------------- */
.tech-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.65rem;
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--color-text-secondary);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-sm);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.55rem;
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    color: var(--color-accent);
    border: var(--border-width) solid currentColor;
    border-radius: var(--radius-pill);
}

/* --- Project card -----------------------------------------------------------
   The title link is stretched over the whole card; the outbound links sit
   above it on their own layer. */
.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.project-media {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
}

.project-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--color-accent-wash);
    mix-blend-mode: multiply;
    opacity: 0;
    transition: opacity var(--dur-base) ease;
}

.project-image,
.project-image img {
    width: 100%;
    height: 100%;
}

.project-image img {
    object-fit: cover;
    object-position: top center;
    transition: transform var(--dur-slow) var(--ease-out);
}

.project-card:hover .project-image img,
.project-card:focus-within .project-image img {
    transform: scale(1.04);
}

.project-card:hover .project-media::after,
.project-card:focus-within .project-media::after {
    opacity: 1;
}

.project-image-fallback {
    display: grid;
    place-items: center;
    font-family: var(--font-display);
    font-size: var(--text-display-md);
    color: var(--color-border-strong);
}

.project-card-body {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
    gap: var(--space-5);
}

.project-number {
    font-family: var(--font-display);
    font-size: var(--text-display-sm);
    line-height: 1;
    color: var(--color-accent);
}

.project-card-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    min-width: 0;
}

.project-type-badge {
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.project-title {
    margin: 0;
    font-size: var(--text-lg);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

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

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

.project-title-link::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: var(--z-base);
}

.project-title-link:focus-visible {
    outline: none;
}

.project-title-link:focus-visible::after {
    outline: 3px solid var(--color-accent);
    outline-offset: 6px;
}

.project-description {
    margin: 0;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

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

.project-actions {
    position: relative;
    z-index: var(--z-raised);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    margin-top: var(--space-2);
}

.project-action-link {
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-text-muted);
}

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

.project-arrow {
    font-size: var(--text-lg);
    color: var(--color-accent);
    transition: transform var(--dur-base) var(--ease-out);
}

.project-card:hover .project-arrow {
    transform: translateX(6px);
}

/* --- Form ------------------------------------------------------------------ */
.contact-form {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.contact-form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

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

.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}

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

.form-control:hover {
    border-color: var(--color-border-strong);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

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

.form-group:has(.form-error) .form-control {
    border-color: var(--color-error);
}

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

.form-error-summary {
    margin-bottom: var(--space-5);
    padding: var(--space-4) var(--space-5);
    border: var(--border-width) solid var(--color-error-border);
    border-left-width: 3px;
    border-left-color: var(--color-error);
    background: var(--color-error-bg);
}

.form-error-summary-title {
    margin: 0;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    color: var(--color-error);
}

.form-error-summary-list {
    margin: var(--space-3) 0 0;
    padding-left: var(--space-5);
}

.form-error-summary-list li {
    margin: 0 0 var(--space-2);
    color: var(--color-text-primary);
}

.form-error-summary-list li:last-child {
    margin-bottom: 0;
}

.form-error-summary-list a {
    color: var(--color-text-primary);
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

.form-error-summary-list a:hover {
    color: var(--color-error);
}

.form-error p {
    margin: 0;
}

/* Honeypot: off-screen rather than display:none, which some bots skip. */
.form-trap {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-5);
}

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

/* --- Alerts ----------------------------------------------------------------- */
.messages {
    display: flex;
    flex-direction: column;
    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);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    border: var(--border-width) solid var(--color-border);
    border-left-width: 3px;
}

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

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

.alert-close {
    flex: none;
    padding: 0 var(--space-1);
    font-size: var(--text-lg);
    line-height: 1;
    color: var(--color-text-primary);
    border: 0;
    cursor: pointer;
}

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

/* --- Footer ----------------------------------------------------------------- */
.site-footer {
    border-top: var(--border-width) solid var(--color-border);
}

.footer-content {
    max-width: var(--shell-max);
    margin-inline: auto;
    padding: var(--space-8) var(--shell-pad) var(--space-6);
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: var(--border-width) solid var(--color-border);
}

.footer-identity {
    margin: 0;
    font-family: var(--font-display);
    font-size: var(--text-display-sm);
    line-height: 1;
    text-transform: uppercase;
}

.footer-tagline {
    margin: var(--space-2) 0 0;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

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

.footer-link {
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    letter-spacing: var(--tracking-label);
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-text-secondary);
}

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

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-3);
    padding-top: var(--space-5);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.footer-bottom p {
    margin: 0;
}