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

:root {
    --primary: #0d59f2;
    --background: #101622;
    --header-bg: rgba(16, 22, 34, 0.8);
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --panel: rgba(2, 6, 23, 0.5);
    --card: rgba(34, 47, 73, 0.3);
    --border: #1e293b;
    --input-bg: rgba(34, 47, 73, 0.5);
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --green-400: #4ade80;
    --cyan-400: #22d3ee;
    --red-500: #ef4444;
    --yellow-500: #eab308;
    --green-500: #22c55e;
}

.light-mode {
    --background: #f3f4f6; /* soft white-grey */
    --header-bg: rgba(255, 255, 255, 0.95);
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --panel: rgba(255, 255, 255, 0.96);
    --card: rgba(255, 255, 255, 0.98);
    --border: #e2e8f0;
    --input-bg: #ffffff;
    --primary: #2563eb;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--background);
    background-image: none;
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.4s ease-in, color 0.4s ease-in;
}

/* Subtle light mode background texture */
.light-mode body, body.light-mode {
    background-color: var(--background);
    background-image: radial-gradient(circle at 20% 10%, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.0) 45%),
                      radial-gradient(circle at 80% 90%, rgba(255,255,255,0.6) 0%, rgba(255,255,255,0.0) 50%);
    background-blend-mode: lighten;
}

.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    max-width: 40px;
    max-height: 40px;
    aspect-ratio: 1 / 1;
    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text-primary);
    cursor: pointer;
    line-height: 0;
    transition: background-color 200ms ease-in, border-color 200ms ease-in, transform 120ms ease-out;
    overflow: hidden;
}

.theme-toggle:hover {
    border-color: var(--primary);
}

.theme-toggle .label,
.theme-toggle .dot {
    display: none;
}

/* Theme icons */

/* Center icons within circular toggle */
.theme-icon {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 18px;
    height: 18px;
    color: var(--text-primary);
    transform: translate(-50%, -50%);
    transition: opacity 180ms ease, transform 180ms ease;
    pointer-events: none;
}

.theme-icon.sun { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
.theme-icon.moon { opacity: 1; transform: translate(-50%, -50%) scale(1); }

.light-mode .theme-icon.sun { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.light-mode .theme-icon.moon { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }

/* Water droplet ripples: concentric circles with fade */
.theme-toggle::before,
.theme-toggle::after,
.theme-toggle .r1,
.theme-toggle .r2 {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0;
    border: 2px solid var(--primary);
}

@keyframes ripple-wave {
    0% { opacity: 0.5; transform: translate(-50%, -50%) scale(0.4); }
    60% { opacity: 0.25; }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(6); }
}

.theme-toggle.ripple::before { animation: ripple-wave 700ms ease-out forwards; }
.theme-toggle.ripple::after { animation: ripple-wave 900ms ease-out forwards; }
.theme-toggle.ripple .r1 { animation: ripple-wave 1100ms ease-out forwards; }
.theme-toggle.ripple .r2 { animation: ripple-wave 1300ms ease-out forwards; }

.light-mode .theme-toggle {
    background: var(--panel);
}

#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
    z-index: 1;
}

/* Header Styles */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-content {
    display: flex;
    height: 4rem;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.logo {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: bold;
    text-decoration: none;
}

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

nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--primary);
}

.menu-icon {
    display: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Main Content */
.main-content {
    margin-top: 4rem;
    padding: 2.5rem 2rem;
}

/* Hero Section */
#hero {
    padding-top: 4rem;
    text-align: center;
    margin-bottom: 2rem;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 1.5rem;
}

.hero-text {
    flex: 1;
    text-align: left;
    max-width: 500px;
}

.hero-3d-container {
    flex-shrink: 0;
}

.model-viewer-placeholder {
    perspective: 1000px;
    width: 200px;
    height: 200px;
}

.model-viewer-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.neural-network {
    width: 220px;
    height: 180px;
    position: relative;
}

.neural-svg {
    width: 100%;
    height: 100%;
}

.synapse {
    stroke: rgba(13, 89, 242, 0.25);
    stroke-width: 1.5;
    stroke-linecap: round;
    animation: connectionPulse 4s ease-in-out infinite;
}

.neuron {
    stroke: var(--primary);
    stroke-width: 2;
    transition: all 0.3s ease;
}

.neuron.input {
    fill: rgba(34, 211, 238, 0.6);
    animation: inputPulse 2s ease-in-out infinite;
}

.neuron.hidden {
    fill: rgba(13, 89, 242, 0.5);
    animation: hiddenPulse 3s ease-in-out infinite;
}

.neuron.output {
    fill: rgba(160, 174, 192, 0.6);
    animation: outputPulse 2.5s ease-in-out infinite;
}

@keyframes connectionPulse {
    0%, 100% { 
        stroke: rgba(13, 89, 242, 0.25);
        stroke-width: 1.5;
    }
    50% { 
        stroke: rgba(34, 211, 238, 0.7);
        stroke-width: 2;
    }
}

@keyframes inputPulse {
    0%, 100% { 
        fill: rgba(34, 211, 238, 0.6);
        filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.4));
    }
    50% { 
        fill: rgba(34, 211, 238, 1);
        filter: drop-shadow(0 0 12px rgba(34, 211, 238, 0.8));
    }
}

@keyframes hiddenPulse {
    0%, 100% { 
        fill: rgba(13, 89, 242, 0.5);
        filter: drop-shadow(0 0 6px rgba(13, 89, 242, 0.4));
    }
    50% { 
        fill: rgba(13, 89, 242, 0.9);
        filter: drop-shadow(0 0 12px rgba(13, 89, 242, 0.8));
    }
}

@keyframes outputPulse {
    0%, 100% { 
        fill: rgba(160, 174, 192, 0.6);
        filter: drop-shadow(0 0 6px rgba(160, 174, 192, 0.4));
    }
    50% { 
        fill: rgba(160, 174, 192, 1);
        filter: drop-shadow(0 0 12px rgba(160, 174, 192, 0.8));
    }
}

.model-label {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: -0.5rem;
}

h1 {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    letter-spacing: -0.033em;
}

h2.subtitle {
    color: var(--primary);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.description {
    color: var(--text-muted);
    font-size: 0.875rem;
    max-width: 32rem;
    margin: 0 auto 1.5rem;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 2rem;
}

button, .btn {
    min-width: 84px;
    cursor: pointer;
    border-radius: 0.5rem;
    height: 2.5rem;
    padding: 0 1rem;
    font-size: 0.875rem;
    font-weight: bold;
    border: none;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn .icon {
    font-size: 1rem;
}

.btn svg.icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.btn-secondary {
    background-color: rgba(34, 47, 73, 0.9);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-secondary:hover {
    background-color: rgba(34, 47, 73, 1);
    box-shadow: 0 10px 24px rgba(13, 89, 242, 0.25);
}

.light-mode .btn-secondary {
    background-color: #e8edff;
    color: #0b1020;
    border: 1px solid rgba(13, 89, 242, 0.25);
}

.light-mode .btn-secondary:hover {
    background-color: #d9e5ff;
    box-shadow: 0 10px 24px rgba(13, 89, 242, 0.2);
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-primary:hover {
    background-color: #0b52de;
    box-shadow: 0 10px 24px rgba(13, 89, 242, 0.3);
}

/* Skills Section - Tag Cloud */
.skills-cloud-container {
    position: relative;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    background: radial-gradient(circle at 20% 20%, rgba(13, 89, 242, 0.12), transparent 40%),
                radial-gradient(circle at 80% 30%, rgba(240, 147, 251, 0.1), transparent 35%),
                linear-gradient(145deg, var(--background) 0%, var(--background) 60%, var(--background) 100%);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    margin: 2.5rem 0;
    padding: 3rem 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    min-height: 420px;
    overflow: hidden;
    backdrop-filter: blur(8px);
}

.skills-cloud-container::before,
.skills-cloud-container::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.skills-cloud-container::before {
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.04), transparent 45%);
    mix-blend-mode: screen;
}

.skills-cloud-container::after {
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.35;
}

.skill-tag {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.32), rgba(102, 126, 234, 0.24));
    border: 1px solid rgba(13, 89, 242, 0.4);
    color: #f8fbff;
    font-weight: 700;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
    position: relative;
    animation: float 7s ease-in-out infinite;
    box-shadow: 0 10px 30px rgba(13, 89, 242, 0.2);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.skill-tag::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0));
    opacity: 0;
    transition: opacity 0.25s ease;
}

.skill-tag:hover {
    transform: translateY(-8px) scale(1.07);
    box-shadow: 0 18px 36px rgba(13, 89, 242, 0.35);
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.45), rgba(102, 126, 234, 0.34));
}

.skill-tag:hover::before {
    opacity: 1;
}

/* Size variations based on proficiency */
.skill-large {
    font-size: 2rem;
    padding: 0.75rem 2rem;
}

.skill-medium {
    font-size: 1.45rem;
    padding: 0.65rem 1.85rem;
}

.skill-small {
    font-size: 1.05rem;
    padding: 0.5rem 1.35rem;
}

/* Color variations based on level */
.skill-tag[data-level="expert"] {
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.5), rgba(102, 126, 234, 0.36));
    border-color: rgba(13, 89, 242, 0.8);
    color: #ffffff;
}

.skill-tag[data-level="advanced"] {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.34), rgba(102, 126, 234, 0.22));
    border-color: rgba(34, 211, 238, 0.75);
    color: #eafcff;
}

.skill-tag[data-level="intermediate"] {
    background: linear-gradient(135deg, rgba(148, 163, 184, 0.26), rgba(71, 85, 105, 0.22));
    border-color: rgba(148, 163, 184, 0.7);
    color: #e1e7f0;
}

/* Accent rotations and palettes */
.skill-tag:nth-child(3n+1) {
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.42), rgba(34, 211, 238, 0.3));
    transform: rotate(-1deg);
}

.skill-tag:nth-child(3n+2) {
    background: linear-gradient(135deg, rgba(240, 147, 251, 0.38), rgba(102, 126, 234, 0.26));
    transform: rotate(1deg);
}

.skill-tag:nth-child(3n) {
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.34), rgba(13, 89, 242, 0.22));
}

/* Floating animation with varied timing */
.skill-tag:nth-child(1) { animation-delay: 0s; animation-duration: 7s; }
.skill-tag:nth-child(2) { animation-delay: 0.4s; animation-duration: 7.5s; }
.skill-tag:nth-child(3) { animation-delay: 0.8s; animation-duration: 8s; }
.skill-tag:nth-child(4) { animation-delay: 1.2s; animation-duration: 7.2s; }
.skill-tag:nth-child(5) { animation-delay: 1.6s; animation-duration: 7.8s; }
.skill-tag:nth-child(6) { animation-delay: 2s; animation-duration: 7.4s; }
.skill-tag:nth-child(7) { animation-delay: 2.4s; animation-duration: 8s; }
.skill-tag:nth-child(8) { animation-delay: 2.8s; animation-duration: 7.1s; }
.skill-tag:nth-child(9) { animation-delay: 3.2s; animation-duration: 7.9s; }
.skill-tag:nth-child(10) { animation-delay: 3.6s; animation-duration: 7.3s; }
.skill-tag:nth-child(11) { animation-delay: 4s; animation-duration: 7.6s; }
.skill-tag:nth-child(12) { animation-delay: 4.4s; animation-duration: 7.2s; }
.skill-tag:nth-child(13) { animation-delay: 4.8s; animation-duration: 8.1s; }
.skill-tag:nth-child(14) { animation-delay: 5.2s; animation-duration: 7.5s; }
.skill-tag:nth-child(15) { animation-delay: 5.6s; animation-duration: 7.9s; }
.skill-tag:nth-child(16) { animation-delay: 6s; animation-duration: 7.4s; }
.skill-tag:nth-child(17) { animation-delay: 6.4s; animation-duration: 8.2s; }
.skill-tag:nth-child(18) { animation-delay: 6.8s; animation-duration: 7.6s; }
.skill-tag:nth-child(19) { animation-delay: 7.2s; animation-duration: 7.8s; }
.skill-tag:nth-child(20) { animation-delay: 7.6s; animation-duration: 7.3s; }

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-12px);
    }
}

/* Section Headers */
.section-header {
    color: var(--text-primary);
    font-size: 1.375rem;
    font-weight: bold;
    padding: 2.5rem 0 0.75rem;
    font-family: monospace;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    background-color: var(--card);
    padding: 1rem;
    transition: transform 0.2s, box-shadow 0.2s ease, border-color 0.2s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    border-color: rgba(13, 89, 242, 0.4);
}

.project-image {
    width: 100%;
    aspect-ratio: 16/9;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: 0.5rem;
    background-color: var(--slate-800);
}

.project-title {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
}

.project-description {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.status-completed { color: var(--green-400); }
.status-live { color: var(--cyan-400); }

.tag-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(51, 65, 85, 0.5);
}

.tag {
    border-radius: 9999px;
    background-color: rgba(13, 89, 242, 0.2);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary);
}

/* Project Links */
.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.875rem;
    background-color: rgba(13, 89, 242, 0.15);
    color: var(--primary);
    border-radius: 0.375rem;
    font-size: 0.8rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid rgba(13, 89, 242, 0.3);
    transition: all 0.2s ease;
}

.project-link:hover {
    background-color: rgba(13, 89, 242, 0.25);
    border-color: rgba(13, 89, 242, 0.6);
    box-shadow: 0 4px 12px rgba(13, 89, 242, 0.2);
}

.light-mode .project-link {
    background-color: rgba(13, 89, 242, 0.08);
    color: #0d59f2;
    border-color: rgba(13, 89, 242, 0.2);
}

.light-mode .project-link:hover {
    background-color: rgba(13, 89, 242, 0.15);
    border-color: rgba(13, 89, 242, 0.4);
}

/* Blog Section */
#blog {
    margin: 4rem 0;
}

.blog-container {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.blog-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    background: var(--card);
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 600px;
    transition: transform 0.2s, box-shadow 0.2s ease, border-color 0.2s ease;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    border-color: rgba(13, 89, 242, 0.4);
}

.blog-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.2) 0%, rgba(13, 89, 242, 0.05) 100%);
    color: var(--primary);
}

.blog-icon svg {
    width: 48px;
    height: 48px;
}

.blog-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.blog-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.blog-description {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 520px;
    margin: 0;
    text-align: left;
}

.blog-description strong {
    color: var(--primary);
    font-weight: 600;
}

.blog-meta {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.blog-date,
.blog-read-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.blog-btn {
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

.blog-btn:hover {
    transform: translateY(-2px);
}

/* Light mode adjustments for blog */
.light-mode .blog-card {
    background: rgba(255, 255, 255, 0.95);
    border-color: #e2e8f0;
}

.light-mode .blog-icon {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(37, 99, 235, 0.05) 100%);
    color: #2563eb;
}

/* Experience Timeline */
.timeline {
    border-left: 2px solid var(--border);
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

.timeline-dot {
    position: absolute;
    left: -2rem;
    top: 0.25rem;
    height: 1rem;
    width: 1rem;
    border-radius: 50%;
    background-color: var(--primary);
    border: 4px solid var(--background-dark);
}

.timeline-title {
    color: var(--text-primary);
    font-weight: 500;
}

.timeline-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Contact Form */
.contact-form {
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    background-color: var(--panel);
    padding: 2rem;
    margin-bottom: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

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

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

input, textarea {
    width: 100%;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    background-color: var(--input-bg);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-family: inherit;
}

input::placeholder, textarea::placeholder {
    color: var(--text-muted);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 89, 242, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    width: 100%;
    height: 3rem;
    background-color: var(--primary);
    color: white;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-btn:hover {
    background-color: rgba(13, 89, 242, 0.8);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    text-align: center;
}

.form-status.success {
    background-color: rgba(34, 197, 94, 0.1);
    color: var(--green-500);
    border: 1px solid var(--green-500);
}

.form-status.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--red-500);
    border: 1px solid var(--red-500);
}

.alternative-contact {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.alternative-contact p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.email-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.2s;
}

.email-link:hover {
    color: rgba(13, 89, 242, 0.8);
    text-decoration: underline;
}

/* Footer */
footer {
    margin-top: 4rem;
    border-top: 1px solid var(--border);
    padding: 1.5rem 2rem;
}

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

.footer-text {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-link {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.footer-link svg {
    width: 16px;
    height: 16px;
}

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

/* Light Mode Skill Tags */
.light-mode .skill-tag {
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.15), rgba(102, 126, 234, 0.1));
    border: 1px solid rgba(13, 89, 242, 0.3);
    color: #0d59f2;
    text-shadow: none;
    box-shadow: 0 4px 12px rgba(13, 89, 242, 0.08);
}

.light-mode .skill-tag:hover {
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.25), rgba(102, 126, 234, 0.18));
    border-color: rgba(13, 89, 242, 0.6);
    box-shadow: 0 8px 20px rgba(13, 89, 242, 0.12);
}

/* Light mode skills container shadow */
.light-mode .skills-cloud-container {
    background: white;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}


.light-mode .skill-tag[data-level="expert"] {
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.22), rgba(102, 126, 234, 0.15));
    border-color: rgba(13, 89, 242, 0.5);
    color: #0d59f2;
}

.light-mode .skill-tag[data-level="advanced"] {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.18), rgba(102, 126, 234, 0.12));
    border-color: rgba(34, 211, 238, 0.45);
    color: #0891b2;
}

.light-mode .skill-tag[data-level="intermediate"] {
    background: linear-gradient(135deg, rgba(107, 114, 128, 0.15), rgba(71, 85, 105, 0.1));
    border-color: rgba(107, 114, 128, 0.4);
    color: #4b5563;
}

.light-mode .skill-tag:nth-child(3n+1) {
    background: linear-gradient(135deg, rgba(13, 89, 242, 0.18), rgba(34, 211, 238, 0.12));
}

.light-mode .skill-tag:nth-child(3n+2) {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.18), rgba(102, 126, 234, 0.12));
    color: #ec4899;
}

.light-mode .skill-tag:nth-child(3n) {
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.18), rgba(13, 89, 242, 0.12));
    color: #22c55e;
}

/* Responsive Design */
@media (min-width: 768px) {
    .menu-icon {
        display: none;
    }

    h1 {
        font-size: 3.75rem;
    }

    h2.subtitle {
        font-size: 1.5rem;
    }

    .description {
        font-size: 1rem;
    }

    button, .btn {
        height: 3rem;
        padding: 0 1.25rem;
        font-size: 1rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }

    #hero {
        padding-top: 6rem;
    }
}

@media (max-width: 767px) {
    nav {
        display: none;
    }

    .menu-icon {
        display: block;
    }

    .header-content {
        padding: 0 1rem;
    }

    .main-content {
        padding: 2.5rem 1rem;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

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

    .skills-cloud-container {
        padding: 2rem 1rem;
        gap: 0.75rem;
    }

    .skill-large {
        font-size: 1.5rem;
        padding: 0.625rem 1.5rem;
    }

    .skill-medium {
        font-size: 1.25rem;
        padding: 0.5rem 1.25rem;
    }

    .skill-small {
        font-size: 1rem;
        padding: 0.375rem 1rem;
    }
}