@charset "utf-8";

/* =====================================================================
   0. THEME TOKENS (easy knobs)
   ===================================================================== */

:root {
    --color-page-bg: #f4efe6;
    --color-text-main: #111111;
    --color-text-muted: rgba(17, 17, 17, 0.75);

    --glass-bg: rgba(20, 20, 24, 0.12);
    --glass-bg-hover: rgba(20, 20, 24, 0.18);
    --glass-border: rgba(0, 0, 0, 0.14);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.16);
    --glass-radius: 20px;

    --color-accent: #111111;
    --color-divider: rgba(0, 0, 0, 0.08);

    --font-sans: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    --font-size-body: 16px;
    --line-height-body: 1.6;

    --layout-max-width: 1200px;
    --page-padding-x: 20px;
    --page-padding-y: 40px;
    --section-gap: 40px;
    --card-padding-y: 24px;
    --card-padding-x: 28px;
}

/* =====================================================================
   1. RESET + BASE
   ===================================================================== */

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

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    background: var(--color-page-bg);
    color: var(--color-text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-weight: 600;
    color: var(--color-text-main);
}

h1 {
    font-size: clamp(2.2rem, 3vw, 2.8rem);
    line-height: 1.2;
    margin-bottom: 0.6em;
}

h2 {
    font-size: clamp(1.8rem, 2.4vw, 2.2rem);
    margin-bottom: 0.5em;
}

h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5em;
}

p {
    margin-bottom: 0.75em;
}

a {
    color: var(--color-accent);
    text-decoration: underline;
}

a:hover {
    text-decoration: none;
}

.mt-lg { margin-top: 1.5rem; }

/* =====================================================================
   2. LAYOUT WRAPPERS
   ===================================================================== */

.page-wrapper {
    padding: 30px 0;
}

.layout-shell {
    max-width: calc(var(--layout-max-width) + 2 * var(--page-padding-x));
    margin: 0 auto;
}

.container {
    max-width: var(--layout-max-width);
    margin: 0 auto;
    padding: 0 var(--page-padding-x);
}

.content-wrapper {
    min-height: calc(100vh - 260px);
    padding: var(--page-padding-y) 0;
}

.section {
    margin-bottom: var(--section-gap);
}

/* Multi-page system */
.page {
    display: none;
}

.page.is-active {
    display: block;
}

/* =====================================================================
   3. GLASS + CARDS + BUTTONS
   ===================================================================== */

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--glass-radius);
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    color: var(--color-text-main);
}

.glass:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-4px);
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.2);
}

.card {
    padding: var(--card-padding-y) var(--card-padding-x);
    border-radius: var(--glass-radius);
}

.card--center {
    text-align: center;
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.06);
    font-size: 24px;
}

/* Button */
.btn-primary {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 999px;
    border: 2px solid rgba(0, 0, 0, 0.12);
    background: rgba(0, 0, 0, 0.06);
    color: var(--color-text-main);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-primary:hover {
    background: rgba(0, 0, 0, 0.1);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.18);
}

/* =====================================================================
   4. HEADER + NAV
   ===================================================================== */

.site-header {
    margin-top: 10px;
    padding-block: 8px;
}

/* Nav container just provides glass padding */
.nav {
    padding: 22px 28px;
}

/* Grid layout: [logo] [title + nav stacked] */
.nav-layout {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-rows: auto auto;
    column-gap: 24px;
    row-gap: 10px;
    align-items: center;
}

/* Logo column: centered in its column and vertically between the two rows */
.logo {
    grid-row: 1 / span 2;   /* spans title row + nav row */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    align-self: center;     /* vertical centering within the grid area */
    justify-self: center;   /* horizontal centering in its column */
}

.logo-icon {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
    transition: all 0.3s ease;
}

.logo:hover .logo-icon svg {
    transform: scale(1.05) translateY(-2px);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
}


/* Right side: title row + nav row stacked */
.nav-main {
    grid-column: 2 / 3;
    display: flex;
    flex-direction: column;
    align-items: stretch; /* lets the title span full width */
    gap: 10px;
}

.nav-title {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    text-align: center;           /* centered in its row */
    color: var(--color-text-main);
    cursor: pointer;
}

/* Horizontal nav row */
.nav-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;  /* centers the whole button row under the title */
}

.nav-link {
    display: inline-block;
    padding: 11px 26px 12px;
    border-radius: 14px;
    border: 1px solid rgba(0, 0, 0, 0.18);
    font-size: 0.98rem;
    font-weight: 500;
    text-decoration: none;
    color: rgba(17, 17, 17, 0.9);
    background: rgba(255, 255, 255, 0.05);  /* subtle glass on top of header card */
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.18);
    transition:
        background 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

/* Active tab: slightly raised and brighter, but static (no hover jump issue) */
.nav-link.is-active {
    background: rgba(255, 255, 255, 0.12);
    color: var(--color-text-main);
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.24);
}

/* Hover bump only on non-active tabs, a bit more 3D */
.nav-link:not(.is-active):hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--color-text-main);
    transform: translateY(-4px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

/* =====================================================================
   5. HERO (OVERVIEW)
   ===================================================================== */

.section-hero {
    padding: 40px 36px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 1.3fr;
    gap: 32px;
    align-items: center;
}

.hero-media img {
    width: 100%;
    max-width: 440px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

/* =====================================================================
   6. GRID HELPERS
   ===================================================================== */

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.stack {
    display: flex;
    flex-direction: column;
}

.stack--gap-md {
    gap: 16px;
}

/* =====================================================================
   7. BACKGROUND SHAPES
   ===================================================================== */

.bg-shapes {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    background: rgba(0, 0, 0, 0.035);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border-radius: 16px;
    animation: float 6s ease-in-out infinite;
}

.shape-1 { width: 120px; height: 80px; top: 20%; left: 10%; }
.shape-2 { width: 90px; height: 140px; top: 60%; right: 15%; }
.shape-3 { width: 100px; height: 60px; bottom: 20%; left: 20%; }
.shape-4 { width: 80px; height: 120px; top: 10%; right: 30%; }
.shape-5 { width: 110px; height: 70px; bottom: 40%; right: 20%; }
.shape-6 { width: 95px; height: 95px; top: 40%; left: 5%; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-18px); }
}

/* =====================================================================
   8. PIPELINE / ARCHITECTURE
   ===================================================================== */

.section-header-card {
    padding: 40px 40px 32px 40px;
}

.pipeline-grid {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.pipeline-row {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 18px 20px;
}

.pipeline-left {
    flex: 0 0 240px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.pipeline-step {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    background: rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(0, 0, 0, 0.10);
}

.pipeline-right {
    flex: 1;
    min-width: 0;
}

.pipeline-right ul {
    margin: 0 0 10px 1.1rem;
}

.pipeline-right li {
    margin-bottom: 4px;
}

.pipeline-arrow {
    margin: 6px 0 0;
    font-size: 0.95rem;
    opacity: 0.8;
}

/* =====================================================================
   9. TIMELINE
   ===================================================================== */

.section-title {
    margin-bottom: 14px;
}

.timeline {
    display: grid;
    gap: 18px;
    margin-top: 10px;
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 22px 24px;
}

.timeline-icon {
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(0, 0, 0, 0.10);
}

.timeline-content h3 {
    margin-bottom: 8px;
    font-size: 1.3rem;
}

.timeline-content ul {
    margin: 6px 0 10px 1.1rem;
}

.timeline-content li {
    margin-bottom: 5px;
}

/* =====================================================================
   10. VIZ ROWS
   ===================================================================== */

.viz-section {
    margin-top: 32px;
}

.viz-row {
    display: grid;
    grid-template-columns: 1.1fr 1.3fr;
    gap: 24px;
    align-items: stretch;
}

.viz-image,
.viz-text {
    padding: 24px 28px;
}

.viz-image {
    text-align: center;
}

.viz-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.viz-text h3 {
    text-align: center;
    margin-bottom: 12px;
}

.viz-text ul {
    margin-left: 1.1rem;
}

.viz-text li {
    margin-bottom: 0.4rem;
}

/* =====================================================================
   11. CONTACT / REFLECTION
   ===================================================================== */

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.contact-item-text h4 {
    margin-bottom: 4px;
}

/* =====================================================================
   12. FOOTER
   ===================================================================== */

.site-footer {
    margin-top: 40px;
}

.footer-content {
    padding: 24px 24px 26px 24px;
    text-align: center;
    color: var(--color-text-muted);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    cursor: pointer;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.footer-links .nav-link {
    border-bottom: none;
    padding: 6px 14px;
}

.copyright {
    font-size: 0.85rem;
    color: rgba(17, 17, 17, 0.6);
    border-top: 1px solid var(--color-divider);
    padding-top: 12px;
}

/* =====================================================================
   13. RESPONSIVE
   ===================================================================== */

@media (max-width: 900px) {
    .nav-layout {
        grid-template-columns: auto;
        grid-template-rows: auto auto auto;
        row-gap: 10px;
    }

    .logo {
        grid-row: 1 / 2;
    }

    .nav-main {
        grid-column: 1 / 2;
        align-items: flex-start;
    }

    .hero-grid,
    .viz-row {
        grid-template-columns: 1fr;
    }

    .pipeline-row {
        flex-direction: column;
    }

    .timeline-item {
        padding: 20px 18px;
    }

    .section-header-card {
        padding: 28px 18px;
    }
}


@media (max-width: 600px) {
    .nav-links {
        flex-wrap: wrap;
        gap: 12px;
    }

    .nav-link {
        padding-inline: 14px;
        font-size: 0.9rem;
    }

    .card {
        padding: 20px 18px;
    }
}