/* =========================================================
   AberTech — POC landing page
   Re-themed to match ikram-c.github.io:
   Bricolage Grotesque, shared light/dark palette,
   same Auto/Light/Dark switch (shared localStorage key).
   Split-panel layout adapted from TemplateMo 616.
   ========================================================= */

/* ---------- Theme variables (mirrors portfolio main.css) ---------- */

:root {
    --bg: #ffffff;
    --text: #2a2a2a;
    --heading: #111111;
    --muted: #777777;
    --accent: #0a58ca;
    --accent-hover: #003d99;
    --border: #e5e5e5;
    --hover-tint: rgba(10, 88, 202, 0.06);
    --footer-text: #888888;
    --footer-link: #666666;
    --switch-active-bg: #111111;
    --switch-active-text: #ffffff;

    --font-base: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont,
                 "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --transition-panel: 0.55s cubic-bezier(0.23, 1, 0.32, 1);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #1a1a1a;
        --text: #d4d4d4;
        --heading: #ffffff;
        --muted: #999999;
        --accent: #7ab8ff;
        --accent-hover: #a8d0ff;
        --border: #333333;
        --hover-tint: rgba(122, 184, 255, 0.08);
        --footer-text: #777777;
        --footer-link: #999999;
        --switch-active-bg: #ffffff;
        --switch-active-text: #111111;
    }
}

:root[data-theme="dark"] {
    --bg: #1a1a1a;
    --text: #d4d4d4;
    --heading: #ffffff;
    --muted: #999999;
    --accent: #7ab8ff;
    --accent-hover: #a8d0ff;
    --border: #333333;
    --hover-tint: rgba(122, 184, 255, 0.08);
    --footer-text: #777777;
    --footer-link: #999999;
    --switch-active-bg: #ffffff;
    --switch-active-text: #111111;
}

/* ---------- Reset / base ---------- */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-base);
    font-optical-sizing: auto;
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    position: relative;
    transition: background 0.2s ease, color 0.2s ease;
}

/* ---------- Site header ---------- */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 2.5rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.site-brand {
    display: flex;
    align-items: baseline;
    gap: 0.9rem;
    min-width: 0;
}

.site-title {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.015em;
    color: var(--heading);
    text-decoration: none;
    line-height: 1;
    cursor: pointer;
}

.site-divider-v {
    width: 1px;
    height: 14px;
    background: var(--border);
    flex-shrink: 0;
    align-self: center;
}

.site-tagline {
    font-size: 0.75rem;
    color: var(--muted);
    line-height: 1;
    white-space: nowrap;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.site-header-nav {
    display: flex;
    gap: 0.25rem;
}

.site-header-nav a {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--muted);
    text-decoration: none;
    padding: 0.3rem 0.65rem;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.15s ease, background 0.15s ease;
}

.site-header-nav a:hover {
    color: var(--heading);
    background: var(--hover-tint);
}

.site-header-nav a.nav-active {
    color: var(--switch-active-text);
    background: var(--switch-active-bg);
}

.nav-back {
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    white-space: nowrap;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-back:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
}

/* ---------- Theme switch (same control as portfolio) ---------- */

.theme-switch {
    display: inline-flex;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.theme-switch button {
    appearance: none;
    background: transparent;
    color: var(--muted);
    border: 0;
    padding: 0.25rem 0.7rem;
    font: inherit;
    font-size: 0.72rem;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.theme-switch button:hover { color: var(--heading); }

.theme-switch button.is-active {
    background: var(--switch-active-bg);
    color: var(--switch-active-text);
}

.theme-switch button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ---------- Site footer ---------- */

.site-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 2.5rem;
    background: var(--bg);
    border-top: 1px solid var(--border);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.site-footer span,
.site-footer a {
    font-size: 0.75rem;
    color: var(--footer-text);
    text-decoration: none;
}

.site-footer a {
    color: var(--footer-link);
    border-bottom: 1px solid transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.site-footer a:hover {
    color: var(--heading);
    border-bottom-color: var(--heading);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* ---------- Main split layout ---------- */

.split-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    padding-top: 3.8rem;
    padding-bottom: 3rem;
}

.split-divider {
    width: 1px;
    align-self: stretch;
    background: var(--border);
    position: relative;
    z-index: 3;
    flex-shrink: 0;
}

/* ══════════ LEFT SIDE — panels ══════════ */

.left-side {
    width: 50vw;
    position: relative;
    overflow: hidden;
}

.panel {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    justify-content: safe center;
    padding: 1rem 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-panel),
        transform var(--transition-panel);
    pointer-events: none;
    overflow-y: auto;
}

.panel.panel-active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    z-index: 2;
}

/* ── Panel: projects ── */

.panel-header {
    padding: 0 3rem 1.25rem;
}

.panel-header span {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.project-list {
    list-style: none;
    border-top: 1px solid var(--border);
}

.project-item {
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.project-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--hover-tint);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.45s cubic-bezier(0.23, 1, 0.32, 1);
    z-index: 0;
}

.project-item:hover::before,
.project-item.active::before {
    transform: scaleY(1);
}

.project-link {
    display: flex;
    align-items: baseline;
    gap: 1.25rem;
    padding: 1.05rem 3rem;
    text-decoration: none;
    color: inherit;
    position: relative;
    z-index: 1;
    transition: color 0.3s ease;
}

.project-item:hover .project-title,
.project-item.active .project-title {
    color: var(--accent);
}

.project-number {
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--muted);
    min-width: 2rem;
    transition: color 0.3s ease;
}

.project-item:hover .project-number { color: var(--accent); }

.project-title {
    font-weight: 700;
    font-size: clamp(1.15rem, 1.7vw, 1.6rem);
    letter-spacing: -0.015em;
    line-height: 1.15;
    color: var(--heading);
    transition: color 0.3s ease;
}

.project-category {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-left: auto;
    transition: color 0.3s ease;
}

.project-item:hover .project-category { color: var(--accent); }

.project-arrow {
    width: 0;
    overflow: hidden;
    transition: width 0.35s cubic-bezier(0.23, 1, 0.32, 1);
    display: flex;
    align-items: center;
    align-self: center;
}

.project-arrow svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
}

.project-item:hover .project-arrow { width: 24px; }

.panel-footer {
    padding: 1.25rem 3rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.panel-footer span {
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ── Panels: home / about ── */

.about-content,
.contact-content {
    padding: 2rem 3rem;
}

.about-label,
.contact-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1.75rem;
    display: block;
}

.about-headline,
.contact-headline {
    font-weight: 700;
    font-size: clamp(1.7rem, 2.8vw, 2.5rem);
    letter-spacing: -0.015em;
    line-height: 1.2;
    color: var(--heading);
    margin-bottom: 1.75rem;
    max-width: 460px;
}

.about-headline em {
    font-style: italic;
    color: var(--accent);
}

.about-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text);
    max-width: 430px;
    margin-bottom: 2.25rem;
}

.about-stats {
    display: flex;
    gap: 2.5rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.stat-number {
    font-weight: 700;
    font-size: 1.7rem;
    line-height: 1;
    color: var(--accent);
}

.stat-label {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
}

.about-method {
    margin-top: 2rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
    max-width: 460px;
}

.method-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1rem;
    display: block;
}

.about-method ol {
    padding-left: 1.2rem;
    display: grid;
    gap: 0.6rem;
}

.about-method li {
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--text);
}

.about-method li::marker {
    color: var(--accent);
    font-weight: 600;
}

/* ── Panel: contact ── */

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
    max-width: 400px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
}

.form-group input,
.form-group textarea {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 0.55rem 0;
    font-family: var(--font-base);
    font-size: 0.9rem;
    color: var(--text);
    outline: none;
    transition: border-color 0.3s ease;
    resize: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-bottom-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--muted);
    opacity: 0.6;
}

.form-group textarea { min-height: 80px; }

.form-submit {
    align-self: flex-start;
    margin-top: 0.5rem;
    padding: 0.65rem 2.25rem;
    background: var(--switch-active-bg);
    color: var(--switch-active-text);
    border: none;
    border-radius: 999px;
    font-family: var(--font-base);
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.25s ease, color 0.25s ease;
}

.form-submit:hover {
    background: var(--accent);
    color: #ffffff;
}

.contact-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.4rem 1.25rem;
    margin-top: 2.25rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
    max-width: 400px;
    align-items: baseline;
}

.contact-details span {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
}

.contact-details a {
    font-size: 0.9rem;
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
    justify-self: start;
}

.contact-details a:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
}

/* ══════════ RIGHT SIDE — canvas ══════════ */

.canvas-side {
    width: 50vw;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    transition: opacity 0.5s ease;
    z-index: 1;
}

.canvas-placeholder.hidden {
    opacity: 0;
    pointer-events: none;
}

.placeholder-icon {
    width: 48px;
    height: 48px;
    border: 1.5px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-icon svg {
    width: 18px;
    height: 18px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
}

.placeholder-text {
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

/* Shared card style for project previews + context cards */

.canvas-image,
.canvas-context {
    position: absolute;
    inset: 2rem;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity 0.6s cubic-bezier(0.23, 1, 0.32, 1),
        transform 0.6s cubic-bezier(0.23, 1, 0.32, 1),
        background 0.2s ease, border-color 0.2s ease;
    z-index: 0;
}

.canvas-image.visible,
.canvas-context.visible {
    opacity: 1;
    transform: scale(1);
    z-index: 2;
}

.canvas-art {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem;
    min-height: 0;
}

.canvas-art svg {
    width: 100%;
    height: 100%;
    max-width: 340px;
    max-height: 100%;
}

/* SVG illustration helpers — colours follow the theme */
.canvas-art .ln  { stroke: var(--muted);  fill: none; stroke-width: 1.2; }
.canvas-art .ac  { stroke: var(--accent); fill: none; stroke-width: 1.6; }
.canvas-art .fa  { fill: var(--accent);   stroke: none; opacity: 0.85; }
.canvas-art .fm  { fill: var(--muted);    stroke: none; opacity: 0.35; }
.canvas-art .txt {
    fill: var(--muted);
    font-family: var(--font-base);
    font-size: 7px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.canvas-caption,
.canvas-context-overlay {
    border-top: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    flex-shrink: 0;
}

.canvas-caption-title {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.015em;
    color: var(--heading);
    margin-bottom: 0.35rem;
}

.canvas-caption-desc {
    font-size: 0.85rem;
    color: var(--muted);
    line-height: 1.6;
}

.canvas-context-quote {
    font-weight: 600;
    font-style: italic;
    font-size: clamp(0.95rem, 1.4vw, 1.15rem);
    line-height: 1.5;
    color: var(--heading);
    max-width: 400px;
}

.canvas-context-attr {
    display: block;
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 0.7rem;
}

/* ---------- Animations ---------- */

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.panel-active .project-item {
    animation: fadeSlideUp 0.6s cubic-bezier(0.23, 1, 0.32, 1) backwards;
}

/* ---------- Mobile ---------- */

@media (max-width: 900px) {
    body {
        overflow-y: auto;
        overflow-x: hidden;
        height: auto;
    }

    .site-header {
        position: relative;
        padding: 0.75rem 1.25rem;
        flex-wrap: wrap;
        row-gap: 0.5rem;
    }

    .site-tagline { display: none; }

    .header-right { gap: 0.75rem; }

    .site-header-nav a {
        font-size: 0.72rem;
        padding: 0.25rem 0.5rem;
    }

    .theme-switch button {
        padding: 0.2rem 0.55rem;
        font-size: 0.68rem;
    }

    .site-footer {
        position: relative;
        padding: 1.25rem;
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .split-container {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
        padding-top: 0;
        padding-bottom: 0;
    }

    .left-side {
        width: 100%;
        min-height: 50vh;
        position: relative;
    }

    .panel {
        position: relative;
        display: none;
    }

    .panel.panel-active { display: flex; }

    .panel-header,
    .panel-footer {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .project-link { padding: 1rem 1.25rem; }

    .project-title { font-size: clamp(1.1rem, 5vw, 1.5rem); }

    .project-category { display: none; }

    .about-content,
    .contact-content { padding: 1.5rem 1.25rem; }

    .about-stats { gap: 1.75rem; }

    .split-divider {
        width: 100%;
        height: 1px;
    }

    .canvas-side {
        width: 100%;
        min-height: 50vh;
    }

    .canvas-image,
    .canvas-context { inset: 1rem; }

    .canvas-art { padding: 1.5rem; }
}