/* -------------------------------------------------------------
 * Version 3: Premium Developer Experience Design System
 * Inspired by Linear, Vercel, Stripe, and Aceternity UI
 * ------------------------------------------------------------- */

/* Core Design System & Tokens */
:root {
    /* Color Tokens (Premium Dark Default) */
    --bg-color: #050505;
    --section-bg: #09090b;
    --card-bg: #0D1117;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --accent: #3B82F6;
    --accent-rgb: 59, 130, 246;
    --accent-hover: #2563EB;
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(59, 130, 246, 0.3);
    
    /* Asymmetrical Border Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    
    /* Snappy Motion Transitions (200ms - 350ms) */
    --transition-premium: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-speed-fast: 0.2s;
    --transition-speed-normal: 0.3s;
    
    /* Premium Elevation, Gradients & Glows */
    --shadow-flat: 0 1px 2px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    --shadow-hover: 0 12px 30px -10px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(59, 130, 246, 0.2);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    --gradient-glow: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
}

/* Matching Light Theme Palette */
[data-theme="light"] {
    --bg-color: #fcfcfd;
    --section-bg: #f4f4f5;
    --card-bg: #ffffff;
    --text-primary: #09090b;
    --text-secondary: #52525b;
    --accent: #2563EB;
    --accent-rgb: 37, 99, 235;
    --accent-hover: #1d4ed8;
    --border-color: rgba(9, 9, 11, 0.08);
    --border-hover: rgba(37, 99, 235, 0.25);
    --shadow-flat: 0 1px 3px rgba(0, 0, 0, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.9);
    --shadow-hover: 0 12px 25px -10px rgba(9, 9, 11, 0.1), 0 0 0 1px rgba(37, 99, 235, 0.15);
    --shadow-glow: 0 0 15px rgba(37, 99, 235, 0.08);
    --gradient-glow: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.06) 0%, transparent 65%);
}

/* Global Reset & Scroll Experience */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 85px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 0.975rem;
    line-height: 1.7;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-speed-normal) ease, color var(--transition-speed-normal) ease;
    overflow-x: hidden;
}

/* Custom Minimal Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Typography & Hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Sora', sans-serif;
    color: var(--text-primary);
    line-height: 1.25;
    letter-spacing: -0.03em;
    margin-top: 0;
}

h1 {
    font-size: 3.25rem;
    font-weight: 800;
}

h2 {
    font-size: 2rem;
    font-weight: 800;
}

h3 {
    font-size: 1.35rem;
    font-weight: 700;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

/* Layout Sections & Rhythm */
section {
    padding: 100px 0;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-glow);
    pointer-events: none;
    z-index: 0;
}

section:last-of-type {
    border-bottom: none;
}

.container {
    max-width: 1100px;
    position: relative;
    z-index: 1;
}

/* Text Gradient Accents */
.text-gradient {
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-gradient-accent {
    background: linear-gradient(135deg, #60A5FA 0%, #3B82F6 50%, #1D4ED8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Section Subtitle Badge */
.section-subtitle {
    font-family: 'Sora', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.75rem;
    display: inline-block;
    padding: 4px 10px;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 20px;
}

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

/* Premium Vercel/Linear Style Buttons */
.btn-custom {
    font-family: 'Sora', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition-speed-fast) var(--transition-premium);
    text-decoration: none;
    cursor: pointer;
}

.btn-custom-primary {
    background-color: var(--text-primary);
    color: var(--bg-color);
    border: 1px solid var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-custom-primary:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-custom-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-flat);
}

.btn-custom-secondary:hover {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

[data-theme="light"] .btn-custom-secondary:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.btn-custom-accent {
    background-color: var(--accent);
    color: #ffffff;
    border: 1px solid var(--accent);
    box-shadow: var(--shadow-flat);
}

.btn-custom-accent:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Text links with Apple-style Chevrons */
.link-arrow {
    font-family: 'Sora', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition-speed-fast) var(--transition-premium);
}

.link-arrow:hover {
    color: var(--text-primary);
    gap: 8px;
}

/* Premium Monochromatic Cards */
.card-custom {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2.25rem;
    box-shadow: var(--shadow-flat);
    transition: all var(--transition-speed-normal) var(--transition-premium);
    position: relative;
    overflow: hidden;
}

.card-custom::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.015) 0%, transparent 100%);
    pointer-events: none;
}

.card-custom:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}

/* Sticky Navbar with Frosted Blur */
.navbar-custom {
    background-color: rgba(5, 5, 5, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-speed-normal) ease;
    padding: 18px 0;
}

[data-theme="light"] .navbar-custom {
    background-color: rgba(252, 252, 253, 0.8);
}

.navbar-custom.scrolled {
    padding: 12px 0;
    background-color: rgba(5, 5, 5, 0.85);
    border-bottom-color: rgba(255, 255, 255, 0.12);
}

[data-theme="light"] .navbar-custom.scrolled {
    background-color: rgba(252, 252, 253, 0.95);
    border-bottom-color: rgba(0, 0, 0, 0.12);
}

.navbar-brand {
    font-family: 'Sora', sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.04em;
    color: var(--text-primary) !important;
}

/* Navbar active indicator scrollspy styling */
.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 6px 14px !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition-speed-fast) ease;
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary) !important;
}

.nav-link.active {
    color: var(--text-primary) !important;
    background-color: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .nav-link.active {
    background-color: rgba(0, 0, 0, 0.04);
}

/* Theme Toggle Custom */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed-fast) ease;
}

.theme-toggle-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--text-primary);
}

[data-theme="light"] .theme-toggle-btn:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

/* Keyboard navigation accessible outline */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* Hero layout */
.hero-section {
    padding: 180px 0 110px 0;
    min-height: 95vh;
    display: flex;
    align-items: center;
}

.hero-subtitle {
    font-family: 'Sora', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1.25rem;
    display: inline-block;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.04em;
    margin-bottom: 1.25rem;
}

.hero-tagline {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Code Snippet / Mock Terminal Styling */
.code-terminal {
    background-color: #0c1017;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 45px rgba(0,0,0,0.6);
    overflow: hidden;
    font-family: 'SFMono-Regular', Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.8rem;
    text-align: left;
    width: 100%;
}

.terminal-header {
    background-color: #161b22;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.terminal-dot.red { background-color: #ff5f56; }
.terminal-dot.yellow { background-color: #ffbd2e; }
.terminal-dot.green { background-color: #27c93f; }

.terminal-title {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-left: auto;
    margin-right: auto;
    font-weight: 500;
}

.terminal-body {
    padding: 1.5rem;
    color: #c9d1d9;
    line-height: 1.5;
}

.t-comment { color: #8b949e; }
.t-keyword { color: #ff7b72; }
.t-string { color: #a5d6ff; }
.t-func { color: #d2a8ff; }
.t-class { color: #ffa657; }
.t-arg { color: #79c0ff; }

/* Stat Row (Hero Layout) */
.hero-stats-row {
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.hero-stat-item {
    text-align: left;
}

.hero-stat-number {
    font-family: 'Sora', sans-serif;
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Scroll Mouse Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.7rem;
    gap: 4px;
    cursor: pointer;
    z-index: 1;
}

.scroll-indicator-mouse {
    width: 18px;
    height: 28px;
    border: 2px solid var(--border-color);
    border-radius: 9px;
    position: relative;
}

.scroll-indicator-wheel {
    width: 3px;
    height: 5px;
    background-color: var(--accent);
    border-radius: 2px;
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 1.6s infinite;
}

@keyframes scroll-wheel {
    0% { top: 4px; opacity: 1; }
    50% { top: 10px; opacity: 0.2; }
    100% { top: 4px; opacity: 1; }
}

/* About profile container */
.profile-img-container {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 1rem;
    background-color: var(--card-bg);
    box-shadow: var(--shadow-flat);
    overflow: hidden;
}

.profile-img-frame {
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    position: relative;
}

.profile-img-frame::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.4) 100%);
}

.profile-img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s var(--transition-premium);
}

.profile-img-container:hover .profile-img-frame img {
    transform: scale(1.03);
}

/* Elegant Timelines */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent) 0%, var(--border-color) 100%);
}

.timeline-item {
    position: relative;
    margin-bottom: 35px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -28px;
    top: 8px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background-color: var(--bg-color);
    border: 2px solid var(--accent);
    box-shadow: 0 0 8px var(--accent);
    transition: all var(--transition-speed-fast) ease;
}

.timeline-item:hover .timeline-marker {
    background-color: var(--accent);
    box-shadow: 0 0 12px var(--accent);
    transform: scale(1.2);
}

.timeline-year {
    font-family: 'Sora', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-subtitle {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Skills section groups (Avoiding icon wall) */
.skills-column {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    height: 100%;
    transition: all var(--transition-speed-normal) var(--transition-premium);
}

.skills-column:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}

.skills-title {
    font-family: 'Sora', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.skills-badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-badge {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 5px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-speed-fast) ease;
}

[data-theme="light"] .skill-badge {
    background-color: rgba(0, 0, 0, 0.01);
}

.skill-badge:hover {
    background-color: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.25);
    transform: translateY(-1px);
}

/* Project Filter Tabs */
.filter-btn-group {
    display: inline-flex;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: var(--radius-md);
}

[data-theme="light"] .filter-btn-group {
    background-color: rgba(0, 0, 0, 0.02);
}

.filter-btn {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-speed-fast) ease;
}

.filter-btn:hover {
    color: var(--text-primary);
}

.filter-btn.active {
    color: #ffffff;
    background-color: var(--accent);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

/* Premium Project Showcase Cards */
.project-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-flat);
    transition: all var(--transition-speed-normal) var(--transition-premium);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}

.project-card-image-wrap {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.project-card-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--transition-premium);
}

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

.project-card-content {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-category-badge {
    font-family: 'Sora', sans-serif;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 0.5rem;
    display: inline-block;
}

.project-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.35;
    transition: color var(--transition-speed-fast) ease;
}

.project-card:hover .project-card-title {
    color: var(--accent);
}

.project-card-desc {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.project-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 1.25rem;
}

.project-tech-badge {
    font-family: SFMono-Regular, Consolas, monospace;
    font-size: 0.7rem;
    font-weight: 500;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

[data-theme="light"] .project-tech-badge {
    background-color: rgba(0, 0, 0, 0.02);
}

.project-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}

/* Responsibilities List */
.resp-list-custom {
    list-style: none;
    padding-left: 0;
}

.resp-list-custom li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.resp-list-custom li::before {
    content: "–";
    position: absolute;
    left: 2px;
    color: var(--accent);
    font-weight: 700;
}

/* Certificate Cards */
.cert-card-modern {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-flat);
    transition: all var(--transition-speed-normal) var(--transition-premium);
}

.cert-card-modern:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.cert-image-wrap {
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.cert-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s var(--transition-premium);
}

.cert-card-modern:hover .cert-image-wrap img {
    transform: scale(1.03);
}

.cert-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.4;
}

.cert-issuer {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Contact info items layout */
.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.contact-info-icon {
    font-size: 1.2rem;
    color: var(--accent);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-text h4 {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.contact-info-text p, .contact-info-text a {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: 0;
    transition: color var(--transition-speed-fast) ease;
}

.contact-info-text a:hover {
    color: var(--accent);
}

/* Custom premium input fields */
.form-group-custom {
    margin-bottom: 20px;
}

.form-control-custom {
    background-color: rgba(255, 255, 255, 0.02) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-sm) !important;
    padding: 11px 16px !important;
    font-size: 0.85rem !important;
    transition: all var(--transition-speed-fast) ease !important;
}

[data-theme="light"] .form-control-custom {
    background-color: rgba(0, 0, 0, 0.01) !important;
}

.form-control-custom:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.15) !important;
    background-color: rgba(255, 255, 255, 0.03) !important;
}

.form-control-custom::placeholder {
    color: rgba(148, 163, 184, 0.5) !important;
}

label.form-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Modal details */
.modal-content-custom {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
    overflow: hidden;
}

.modal-header-custom {
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
}

.modal-body-custom {
    padding: 2rem;
}

.modal-footer-custom {
    border-top: 1px solid var(--border-color);
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: flex-end;
}

.close-btn-custom {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed-fast) ease;
}

.close-btn-custom:hover {
    background-color: var(--text-primary);
    color: var(--bg-color);
    border-color: var(--text-primary);
}

/* Case study structured modal blocks */
.modal-section-box {
    padding: 1.25rem;
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    margin-bottom: 1.25rem;
}

.modal-section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.modal-section-title.red { color: #f87171; }
.modal-section-title.blue { color: #60a5fa; }
.modal-section-title.green { color: #34d399; }

/* Page Loading Screen */
.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}

.loader-wrapper.fade-out {
    opacity: 0;
    visibility: hidden;
}

.spinner-custom {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--accent);
    border-radius: 50%;
    animation: spin 0.75s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast alert messages style */
.toast-container-custom {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1060;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast-custom {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 280px;
    max-width: 380px;
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.3s var(--transition-premium), opacity 0.3s ease;
}

.toast-custom.show {
    transform: translateY(0);
    opacity: 1;
}

/* Back To Top Button */
.back-to-top-btn {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 99;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-flat);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed-fast) var(--transition-premium);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
}

.back-to-top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top-btn:hover {
    background-color: var(--text-primary);
    color: var(--bg-color);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

/* Footer Section */
.footer-minimal {
    padding: 50px 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-color);
}

.footer-link-group {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 1.5rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8rem;
    transition: color var(--transition-speed-fast) ease;
}

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

.footer-social-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed-fast) ease;
    text-decoration: none;
}

.footer-social-icon:hover {
    color: var(--accent);
    border-color: var(--accent);
    background-color: rgba(59, 130, 246, 0.05);
}

/* Project Animation tag filter logic helper */
.project-item {
    transition: opacity 0.25s ease, transform 0.25s var(--transition-premium);
}

.project-item.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    position: absolute;
    width: 0;
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
    border: none;
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
    section {
        padding: 80px 0;
    }
    .hero-section {
        padding: 140px 0 80px 0;
    }
    h1 {
        font-size: 2.75rem;
    }
    h2 {
        font-size: 1.8rem;
    }
    .border-start-lg {
        border-left: none !important;
        border-top: 1px solid var(--border-color);
        padding-top: 2.5rem;
        margin-top: 1.5rem;
    }
    .hero-illustration-container {
        margin-top: 2rem;
    }
}

@media (max-width: 767.98px) {
    .border-end-md {
        border-right: none !important;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 2rem;
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 575.98px) {
    .hero-title {
        font-size: 2.25rem;
    }
    .hero-tagline {
        font-size: 1.1rem;
    }
    .footer-link-group {
        flex-wrap: wrap;
        gap: 12px 18px;
    }
    .card-custom {
        padding: 1.75rem;
    }
}