/* ==========================================================================
   Base Styles & Variables (Premium Soft Corporate Theme - Alcalay)
   ========================================================================== */

   :root {
    /* Color Palette - Soft Off-Whites, Deep Navy/Charcoal, and Muted Gold */
    --color-bg: #FDFCF8; /* Soft paper cream - easy on the eyes */
    --color-bg-alt: #F4F2EC; /* Slightly darker cream for alternating sections */
    --color-bg-dark: #161A21; /* Very dark slate/navy instead of pitch black */
    
    --color-text-main: #2A2D34; /* Soft charcoal - much better for reading */
    --color-text-muted: #6B707B; /* Elegant grey for subtitles */
    --color-text-light: #FDFCF8;
    --color-text-light-muted: #A0A5B1;
    
    --color-border: #E8E5DC; /* Soft warm border */
    --color-border-dark: #2A303C;
    
    --color-accent: #B89050; /* Premium muted gold/bronze */
    --color-accent-hover: #9E7A43;
    
    /* Outfit (Modern premium sans) — Replacing Source Sans 3 */
    --font-sans: 'Outfit', 'Aptos', 'Segoe UI', system-ui, sans-serif;
    
    /* Spacing & Layout */
    --container-width: 1280px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 7rem;
    
    /* Transitions */
    --transition-fast: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text-main);
    background-color: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-bg-dark);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-md);
}

/* Seção clara: título em caixa alta + bronze (como “CONHEÇA O TWK” na referência) */
.about-section .section-title {
    font-size: clamp(1.35rem, 2.5vw, 1.85rem);
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    line-height: 1.35;
}

.eyebrow {
    font-family: var(--font-sans);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    font-weight: 600;
    color: var(--color-accent); /* Muted gold for small headings */
    display: block;
    margin-bottom: var(--spacing-sm);
}

.eyebrow-light {
    color: var(--color-accent);
}

.lead-text {
    font-size: clamp(1.05rem, 1.8vw, 1.2rem);
    font-weight: 300;
    line-height: 1.65;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-main);
}

.about-section p:not(.lead-text) {
    font-weight: 400;
    color: var(--color-text-main);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

/* Layout Core */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5%;
}

.section {
    padding: var(--spacing-xl) 0;
}

.dark-section {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}
.dark-section h1, .dark-section h2, .dark-section h3, .dark-section h4 {
    color: var(--color-text-light);
}

.text-light { color: var(--color-text-light); }
.text-light-dim { color: var(--color-text-light-muted); }

/* Buttons & Links */
.btn {
    display: inline-block;
    padding: 1.1rem 2.5rem;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    color: var(--color-text-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-bg-dark);
    border-color: var(--color-border-dark);
}

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

.link-underline {
    position: relative;
    display: inline-block;
    color: var(--color-accent);
}

.link-underline::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: currentColor;
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.link-underline:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* ==========================================================================
   Top Global Bar
   ========================================================================== */
.top-bar {
    background-color: var(--color-bg-dark);
    padding: 0.5rem 0;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
    z-index: 1002;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.top-bar-inner {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1.5rem;
}

.top-bar-label {
    color: var(--color-text-light-muted);
}

.top-bar-links {
    display: flex;
    gap: 1.5rem;
}

.top-bar-link {
    color: var(--color-text-light-muted);
    transition: color 0.3s ease;
}

.top-bar-link:hover, .top-bar-link.active {
    color: var(--color-accent);
}

/* Header sits below top-bar; collapses to top on scroll */
.header {
    top: 2rem;
}

/* ==========================================================================
   Preloader
   ========================================================================== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg-dark);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
}

.preloader-text {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text-light);
    letter-spacing: 0.25em;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 0.4; transform: scale(0.98); }
    50% { opacity: 1; transform: scale(1); }
    100% { opacity: 0.4; transform: scale(0.98); }
}

body.loaded .preloader {
    opacity: 0;
    visibility: hidden;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    background-color: transparent;
}

.header.scrolled {
    top: 0;
    padding: 1rem 0;
    background-color: rgba(253, 252, 248, 0.98);
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.header.scrolled.dark-mode {
    background-color: rgba(22, 26, 33, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-bg-dark);
    z-index: 1001; 
}

/* Drop the stark contrast, make it elegant */
.header.dark-mode .logo {
    color: var(--color-text-light);
}

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

.nav-desktop {
    display: flex;
    gap: 3rem;
}

.nav-link {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    color: var(--color-bg-dark);
}

/* In non-scrolled hero if text needs to be light */
.header:not(.scrolled) .logo,
.header:not(.scrolled) .nav-link {
    color: var(--color-text-light); /* Make hero header white since hero BG is dark */
}

.header.dark-mode .nav-link {
    color: var(--color-text-light);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -6px;
    left: 0;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.menu-mobile-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.menu-mobile-btn span {
    width: 100%;
    height: 2px;
    background-color: var(--color-text-light); /* Since hero is dark at first */
    transition: all 0.3s ease;
}

.header.scrolled:not(.dark-mode) .menu-mobile-btn span {
    background-color: var(--color-bg-dark); /* Dark bars on cream nav */
}

/* Mobile Nav */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg-dark); /* High contrast luxury menu */
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

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

.nav-mobile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.nav-link-mobile {
    font-family: var(--font-sans);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text-light);
}

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

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 10vh; 
    overflow: hidden;
    color: var(--color-text-light);
}

/* Barra bronze à esquerda na base do hero (transição para a seção clara) */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 5%;
    width: min(140px, 28vw);
    height: 3px;
    background-color: var(--color-accent);
    z-index: 4;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg-slide {
    position: absolute;
    inset: 0;
    background-color: #1a1f28;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.hero-bg-slide.is-active {
    opacity: 1;
}

/* Indústria | Construção | Tecnologia — imagens premium rotativas */
.hero-bg-slide--industry {
    background-image: url('images/backgrounds/bg-industry.png');
    background-position: center center;
}

.hero-bg-slide--construction {
    background-image: url('images/backgrounds/bg-construction.png');
    background-position: center center;
}

.hero-bg-slide--tech {
    background-image: url('images/backgrounds/bg-tech.png');
    background-position: center center;
}

.hero-bg-shade {
    position: absolute;
    inset: 0;
    z-index: 2;
    background: linear-gradient(to right, rgba(22, 26, 33, 0.92), rgba(22, 26, 33, 0.45));
    pointer-events: none;
}

.hero-content {
    max-width: 850px;
    position: relative;
    z-index: 3;
    margin: 0; /* Keep it left-aligned for an authoritative feel */
}

.hero-segment-hint {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(184, 144, 80, 0.95);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.65rem;
    max-width: 100%;
}

.hero-segment-text {
    line-height: 1.45;
    hyphens: auto;
    overflow-wrap: break-word;
}

.hero-segment-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-accent);
    flex-shrink: 0;
    animation: segmentPulse 2.4s ease-in-out infinite;
}

@keyframes segmentPulse {
    0%, 100% { opacity: 0.55; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.15); }
}

.hero-title {
    font-family: var(--font-sans);
    font-size: clamp(1.75rem, 4.2vw, 2.75rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    line-height: 1.2;
    max-width: 42rem;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--color-text-light-muted);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

/* Light button for dark hero */
.hero .btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-light);
}
.hero .btn-primary:hover {
    background-color: var(--color-text-light);
    color: var(--color-bg-dark);
}

.scroll-down-indicator {
    position: absolute;
    bottom: 5vh;
    left: 5%;
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 4;
    color: rgba(255,255,255,0.7);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.scroll-line {
    width: 50px;
    height: 1px;
    background-color: rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-text-light);
    transform: translateX(-100%);
    animation: scrollLine 2s infinite cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes scrollLine {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(0); }
    100% { transform: translateX(100%); }
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-section {
    background-color: var(--color-bg);
}

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text {
    padding-right: var(--spacing-md);
}

/* Softer image treatment */
.image-wrapper {
    position: relative;
    overflow: hidden;
    padding-bottom: 110%; /* Elegant portrait */
}

.image-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(0.9); /* Softer B&W */
    transition: transform 2s ease, filter 0.8s ease;
}

.image-wrapper:hover img {
    transform: scale(1.03);
    filter: grayscale(40%) contrast(1); /* Reveal a bit of color */
}

/* Subtle architectural frame */
.image-wrapper::after {
    content: '';
    position: absolute;
    top: 2rem;
    left: -2rem;
    right: 2rem;
    bottom: -2rem;
    border: 1px solid var(--color-accent);
    pointer-events: none;
    z-index: -1;
}

/* ==========================================================================
   Expertise Section
   ========================================================================== */
.expertise-section {
    background-color: var(--color-bg-alt); /* Soft cream alternative instead of hard dark */
    color: var(--color-bg-dark);
}

.expertise-section h2, .expertise-section h3 {
    color: var(--color-bg-dark);
}

.expertise-section .section-header {
    max-width: 800px;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.expertise-section .section-desc {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    line-height: 1.65;
    max-width: 600px;
    margin: 0 auto;
}

/* Redesign to soft luxury cards */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.expertise-card {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    position: relative;
    border-top: 2px solid transparent;
    transition: all 0.4s ease;
    box-shadow: 0 4px 20px rgba(0,0,0,0.02);
}

.expertise-card:hover {
    box-shadow: 0 10px 40px rgba(0,0,0,0.06);
    border-top: 2px solid var(--color-accent);
    transform: translateY(-5px);
}

.card-number {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   Differentials Section
   ========================================================================== */
   
.differentials-section {
    background-color: var(--color-bg-dark); /* Very dark slate / navy */
    color: var(--color-text-light);
}

.differentials-section h2, .differentials-section h3 {
    color: var(--color-text-light);
}

.differentials-section .section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.differentials-list {
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border-dark);
}

.diff-item {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border-dark);
}

.diff-title {
    font-size: 1.75rem;
    margin: 0;
    font-family: var(--font-sans);
    font-weight: 300;
}

.diff-content p {
    color: var(--color-text-light-muted);
    font-size: 1.05rem;
    max-width: 600px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--color-bg-dark);
    padding-top: var(--spacing-xl);
    color: var(--color-text-light);
}

.footer h4 { color: var(--color-text-light); }

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.logo-footer {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

.footer-tagline {
    color: var(--color-text-light-muted);
    max-width: 300px;
}

.footer-heading {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.footer-link {
    display: block;
    color: var(--color-text-light-muted);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

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

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: var(--spacing-md);
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border-dark);
    border-radius: 4px;
    color: var(--color-text-light-muted);
    transition: all 0.3s ease;
}

.social-btn svg {
    width: 18px;
    height: 18px;
}

.social-btn:hover {
    background-color: var(--color-accent);
    color: var(--color-text-light);
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(184, 144, 80, 0.2);
}

.footer-text {
    color: var(--color-text-light-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-light-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   Projects Tabs Section
   ========================================================================== */
.projects-section {
    background-color: var(--color-bg-alt);
    color: var(--color-bg-dark);
}

.projects-header .section-desc {
    color: var(--color-text-muted);
}

.tabs-container {
    margin-top: var(--spacing-xl);
}

.tab-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.tab-button {
    appearance: none;
    border: 1px solid var(--color-border-dark);
    background: transparent;
    color: var(--color-bg-dark);
    padding: 0.9rem 1.6rem;
    border-radius: 999px;
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.25s ease;
}

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

.tab-button.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-text-light);
    box-shadow: 0 12px 30px rgba(184, 144, 80, 0.28);
    transform: translateY(-2px);
}

.tab-button:focus-visible {
    outline: 2px solid rgba(184, 144, 80, 0.65);
    outline-offset: 3px;
}

.tab-panels {
    display: block;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: projectPanelIn 0.5s ease both;
}

@keyframes projectPanelIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.project-preview {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.project-thumb {
    height: 330px;
    border-radius: 18px;
    border: 1px solid var(--color-border);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    position: relative;
    background: #1b1f28;
}

.project-thumb::before {
    content: '';
    position: absolute;
    inset: -40% -20%;
    background: radial-gradient(circle at 20% 20%, rgba(184, 144, 80, 0.55), transparent 45%),
        radial-gradient(circle at 70% 50%, rgba(255, 255, 255, 0.14), transparent 45%),
        linear-gradient(135deg, rgba(22, 26, 33, 0.92), rgba(22, 26, 33, 0.55));
    transform: rotate(-6deg);
}

.project-thumb-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.6rem;
    z-index: 2;
}

.project-thumb-mark {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: var(--color-text-light);
    text-transform: uppercase;
    margin-bottom: 0.4rem;
    background: rgba(22, 26, 33, 0.55);
    padding: 0.65rem 0.95rem;
    border-radius: 999px;
    width: fit-content;
    border: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(6px);
}

.project-thumb-sub {
    color: rgba(255, 255, 255, 0.82);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.project-thumb--doabem {
    background: #14141a url('images/projects/doabem-preview.png') no-repeat center;
    background-size: cover;
}

.project-thumb--doabem::before {
    background: radial-gradient(circle at 20% 20%, rgba(184, 144, 80, 0.40), transparent 45%),
        linear-gradient(135deg, rgba(20, 20, 26, 0.85), rgba(20, 20, 26, 0.45));
}

.project-thumb--2doe4 {
    background: #0d0d0d url('images/projects/2doe4-preview.png') no-repeat center;
    background-size: cover;
}

.project-thumb--2doe4::before {
    background: radial-gradient(circle at 20% 20%, rgba(184, 144, 80, 0.40), transparent 45%),
        linear-gradient(135deg, rgba(13, 13, 13, 0.85), rgba(13, 13, 13, 0.45));
}

.project-content .project-title {
    font-size: 1.65rem;
    margin-bottom: 0.6rem;
    color: var(--color-bg-dark);
}

.project-desc {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.project-bullets {
    margin: 0 0 1.2rem 0;
    padding-left: 1.2rem;
}

.project-bullets li {
    margin-bottom: 0.55rem;
    color: var(--color-text-muted);
}

.project-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.6rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */
.slide-up-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-up-element.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media screen and (max-width: 992px) {
    .grid-2-col {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .image-wrapper {
        margin-top: var(--spacing-lg);
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .diff-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .project-preview {
        grid-template-columns: 1fr;
    }

    .project-thumb {
        height: 270px;
    }
}

@media screen and (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .menu-mobile-btn {
        display: flex;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .header.scrolled {
        padding: 1rem 0;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: clamp(1.25rem, 5.2vw, 1.65rem);
        letter-spacing: 0.035em;
    }
    .top-bar-inner {
        justify-content: center;
        gap: 1rem;
    }
    .top-bar-label {
        display: none;
    }
    .top-bar-links {
        gap: 1rem;
    }
    .top-bar-link {
        font-size: 0.65rem;
    }
    .header {
        top: 2rem;
    }

    .nav-link-mobile {
        font-size: clamp(1.5rem, 8vw, 2.25rem);
        text-align: center;
        padding: 0 1rem;
    }

    .hero {
        min-height: 100dvh;
        min-height: 100vh;
        padding-top: max(12vh, 5rem);
        padding-bottom: 6rem;
    }

    .scroll-down-indicator {
        left: 5%;
        bottom: max(3vh, 1.25rem);
    }

    .image-wrapper::after {
        left: 0;
        right: 0;
        top: 1rem;
        bottom: -1rem;
    }

    .logo {
        font-size: 1.2rem;
        letter-spacing: 0.08em;
    }
}

@media (prefers-reduced-motion: reduce) {
    .scroll-line::after {
        animation: none;
    }
}

.menu-mobile-btn.open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-mobile-btn.open span:nth-child(2) {
    opacity: 0;
}

.menu-mobile-btn.open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}