/* ==========================================================================
   SOMSUBHRA DAW - SWISS ARCHITECTURAL MONOCHROME DESIGN SYSTEM
   Zero Gradients | Zero Glass Blur | Zero Rounded Corners | Pure Solid Geometry
   ========================================================================== */

:root {
    /* Color Palette - Core Architectural Theme */
    --bg-dark: #0e0f12;
    --bg-surface: #15161a;
    --bg-surface-elevated: #1a1c22;
    --border-color: #262830;
    --border-strong: #3b3e4a;
    
    /* Architectural Accent */
    --accent-amber: #d97706;
    --accent-muted: #b45309;

    /* Typography Colors */
    --text-main: #f3f2ee;
    --text-muted: #9aa0a6;
    --text-dim: #6b7280;

    /* Fonts */
    --font-heading: 'Outfit', -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-code: 'JetBrains Mono', monospace;

    /* Sharp Geometry & Zero Shadows */
    --radius-none: 0px;
    --transition-fast: 0.15s ease-in-out;
}

/* Base Resets */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border-radius: 0px !important; /* Strict Enforcement of Sharp Corners */
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

/* Off-screen rendering optimizations */
.about, .skills, .education, .projects, .contact {
    content-visibility: auto;
    contain-intrinsic-size: 1px 600px;
}

/* Typography & Section Headers */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-main);
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.solid-highlight {
    color: var(--text-main);
    border-bottom: 2px solid var(--accent-amber);
    display: inline-block;
}

.text-accent {
    color: var(--accent-amber);
}

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

.section-header {
    margin-bottom: 60px;
}

.section-index {
    font-family: var(--font-code);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-amber);
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 14px;
}

.section-description {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.6;
}

/* Opaque Solid Swiss Cards (Zero Glassmorphism, Zero Drop Shadows) */
.swiss-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 32px;
    position: relative;
    transition: background var(--transition-fast), border-color var(--transition-fast);
    box-shadow: none !important;
}

.swiss-card:hover {
    border-color: var(--border-strong);
    background: var(--bg-surface-elevated);
}

/* Solid Architectural Button Engine (Zero Hover Floating/Scaling) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
    outline: none;
    letter-spacing: 0.3px;
    border: 1px solid transparent;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    box-shadow: none !important;
}

.btn-primary {
    background: var(--text-main);
    color: var(--bg-dark);
    border: 1px solid var(--text-main);
}

.btn-primary:hover {
    background: var(--accent-amber);
    color: var(--bg-dark);
    border-color: var(--accent-amber);
}

.btn-outline {
    background: var(--bg-surface);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--text-main);
    color: var(--bg-dark);
    border-color: var(--text-main);
}

.btn-full {
    width: 100%;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    font-family: var(--font-code);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-amber);
    margin-bottom: 20px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-amber);
    display: inline-block;
}

/* Header & Dock Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.nav-logo {
    font-family: var(--font-code);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--accent-amber);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2px;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    padding: 8px 16px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: background var(--transition-fast), color var(--transition-fast);
    border: 1px solid transparent;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main);
    background: var(--bg-surface);
    border-color: var(--border-color);
}

.nav-actions {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 38px;
    height: 38px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.icon-btn:hover {
    background: var(--text-main);
    color: var(--bg-dark);
    border-color: var(--text-main);
}

.cmd-k-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 38px;
    padding: 0 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.cmd-k-btn:hover {
    background: var(--bg-surface-elevated);
    border-color: var(--border-strong);
}

.cmd-k-badge {
    font-family: var(--font-code);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 6px;
    background: var(--bg-dark);
    color: var(--accent-amber);
    border: 1px solid var(--border-color);
}

.mobile-toggle {
    display: none;
}

/* Hero Section */
.hero {
    min-height: 90vh;
    padding-top: 140px;
    padding-bottom: 70px;
    display: flex;
    align-items: center;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 20px;
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--accent-amber);
    margin-left: 4px;
    vertical-align: middle;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 28px;
    max-width: 560px;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

/* 4-Column Structured Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

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

.stat-number {
    font-family: var(--font-code);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-dim);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.avatar-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 14px;
    width: 100%;
    max-width: 340px;
}

.avatar-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Swiss 2-Column Grid Layout */
.swiss-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.card-header-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.card-icon-box {
    width: 42px;
    height: 42px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-main);
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
}

.card-subtitle {
    font-size: 0.82rem;
    color: var(--text-dim);
    font-weight: 600;
}

.card-heading {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.card-meta-label {
    font-family: var(--font-code);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-amber);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 10px;
}

.card-text {
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.65;
    margin-bottom: 18px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    font-family: var(--font-code);
    font-size: 0.78rem;
    padding: 4px 10px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

/* Skill Grid (2-Column & 4-Column Layouts) */
.skill-meters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.skill-meter-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    align-items: center;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.skill-meter-card:hover {
    background: var(--bg-surface-elevated);
    border-color: var(--border-strong);
}

.meter-header {
    display: flex;
    align-items: center;
    width: 100%;
}

.meter-title {
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-main);
}

/* Experience & Education Grid */
.edu-exp-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.col-title-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    font-size: 1.3rem;
}

.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 14px;
    width: 1px;
    height: 100%;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 44px;
    margin-bottom: 24px;
}

.timeline-dot {
    position: absolute;
    left: 10px;
    top: 24px;
    width: 9px;
    height: 9px;
    background: var(--accent-amber);
    border: 1px solid var(--bg-dark);
}

.timeline-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 24px;
}

.timeline-date {
    font-family: var(--font-code);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-amber);
    margin-bottom: 6px;
    display: inline-block;
}

.company-name {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.degree-title {
    font-size: 1.3rem;
    margin-bottom: 4px;
}

.degree-dept {
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 10px;
}

.degree-inst {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.degree-inst a {
    color: var(--text-main);
    text-decoration: underline;
}

/* Projects Showcase Section */
.projects-showcase-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.project-showcase-card {
    padding: 36px;
}

.project-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 16px;
}

.project-title-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.project-icon-box {
    width: 48px;
    height: 48px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--text-main);
}

.project-title {
    font-size: 1.45rem;
    font-weight: 700;
}

.project-subtitle {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.project-footer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.project-actions {
    display: flex;
    gap: 12px;
}

/* Contact Section & Form */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 32px;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-detail-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon-box {
    width: 42px;
    height: 42px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-main);
}

.contact-detail-label {
    font-family: var(--font-code);
    font-size: 0.72rem;
    color: var(--text-dim);
    font-weight: 700;
    display: block;
}

.contact-detail-value {
    color: var(--text-main);
    font-weight: 600;
    text-decoration: none;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-amber);
}

/* Command Palette Modal */
.cmd-palette-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(14, 15, 18, 0.9);
    z-index: 3000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 100px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast);
}

.cmd-palette-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.cmd-palette-card {
    width: 90%;
    max-width: 580px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: none !important;
}

.cmd-input-wrapper {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    gap: 12px;
}

.cmd-input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 1.05rem;
    font-family: inherit;
}

.cmd-results {
    max-height: 320px;
    overflow-y: auto;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cmd-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    color: var(--text-main);
    text-decoration: none;
    cursor: pointer;
    background: transparent;
    border: 1px solid transparent;
}

.cmd-item:hover {
    background: var(--bg-dark);
    border-color: var(--border-color);
}

.cmd-badge-tag {
    font-family: var(--font-code);
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* Project Drawer & Lightbox Modals */
.project-drawer-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(14, 15, 18, 0.9);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast);
}

.project-drawer-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.project-drawer-card {
    width: 90%;
    max-width: 680px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 36px;
    box-shadow: none !important;
}

.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.drawer-title {
    font-size: 1.45rem;
    font-weight: 700;
}

.drawer-subtitle {
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* Code Spec Box for Real Lab Demo */
.code-spec-box {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    overflow: hidden;
}

.code-spec-header {
    background: var(--bg-surface);
    padding: 8px 14px;
    border-bottom: 1px solid var(--border-color);
    font-family: var(--font-code);
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.code-spec-body {
    padding: 16px;
    font-family: var(--font-code);
    font-size: 0.82rem;
    color: var(--accent-amber);
    line-height: 1.6;
    overflow-x: auto;
}

/* Toasts */
#toast-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 4000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--text-main);
    color: var(--bg-dark);
    font-weight: 700;
    font-size: 0.9rem;
    border: 1px solid var(--text-main);
    opacity: 0;
    transition: opacity 0.25s ease;
    box-shadow: none !important;
}

.toast.show {
    opacity: 1;
}

/* Footer */
.footer {
    padding: 36px 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-dark);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.88rem;
    color: var(--text-dim);
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-link-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.88rem;
    cursor: pointer;
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.footer-link-btn:hover {
    color: var(--text-main);
}

.footer-divider {
    color: var(--border-color);
}

.legal-modal-card {
    max-height: 85vh;
    overflow-y: auto;
}

.legal-modal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-top: 10px;
}

.legal-modal-body h4 {
    font-size: 1.05rem;
    color: var(--text-main);
    margin-bottom: 2px;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .mobile-toggle {
        display: inline-flex;
    }

    .nav-menu {
        position: absolute;
        top: 66px;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-fast);
        display: block;
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }

    .nav-link {
        padding: 10px 16px;
        font-size: 0.95rem;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .swiss-grid, .edu-exp-grid, .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .cmd-k-badge {
        display: none;
    }
}

@media (max-width: 640px) {
    .section-padding {
        padding: 60px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .swiss-card, .contact-info, .contact-form-card {
        padding: 22px 18px;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}