/* ===== CSS VARIABLES ===== */
:root {
    /* Blue & White Theme Colors */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    --accent-blue: #0ea5e9;
    --accent-light: #38bdf8;
    --accent-dark: #0284c7;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Light theme colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-elevated: #f8fafc;

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --text-muted: #94a3b8;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 50%, #1e3a8a 100%);
    --gradient-secondary: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    --gradient-hero: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(29, 78, 216, 0.05) 100%);

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.15);
    --shadow-2xl: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
    --glow-primary: 0 0 20px rgba(59, 130, 246, 0.4);
    --glow-secondary: 0 0 30px rgba(14, 165, 233, 0.3);

    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --navbar-height: 70px;
    --container-padding: var(--space-4);
}

/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Clean geometric background pattern */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        linear-gradient(135deg, var(--primary-50) 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, var(--primary-100) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--primary-50) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: transform 0.35s ease, background 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav {
    display: flex;
    margin-top: 15px;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--container-padding);
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-fast);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--space-2) var(--space-4);
    position: relative;
    transition: var(--transition-fast);
    border-radius: var(--radius-lg);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
    border-radius: var(--radius-full);
}

.nav-links a:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-links a:hover::after {
    width: 60%;
}

.nav-links a.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-links a.active::after {
    width: 60%;
}

.social-nav {
    display: flex;
    gap: var(--space-3);
    margin-left: var(--space-4);
}

.social-nav a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-50);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-600);
    text-decoration: none;
    transition: var(--transition-normal);
    font-size: 1.1rem;
    border: 1px solid var(--primary-200);
}

.social-nav a:hover {
    background: var(--primary-600);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
    border-color: var(--primary-600);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    max-width: 1200px;
    width: 100%;
    padding: 0 var(--container-padding);
    animation: heroFadeIn 1.2s ease-out;
}

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-text h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    line-height: 1.1;
}

.hero-text .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.profile-avatar {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    margin: 0 auto;
    box-shadow: var(--shadow-2xl), var(--glow-primary);
    border: 4px solid var(--primary-100);
}

.profile-avatar .profile-img {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.hero .profile-avatar {
    width: 400px;
    height: 400px;
    border-radius: var(--radius-full);
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: var(--shadow-2xl), var(--glow-primary);
    border: 4px solid var(--primary-100);
    overflow: hidden;
}

/* Imagen dentro del avatar */
.hero .profile-avatar .profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-full);
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--space-20) 0;
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
    position: relative;
    color: var(--text-primary);
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--space-2);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-tertiary);
    max-width: 600px;
    margin: 0 auto var(--space-16);
    text-align: center;
}

/* ===== ABOUT SECTION ===== */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.skill-category {
    background: var(--bg-card);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--glow-primary);
}

.skill-category h4 {
    color: var(--primary-500);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.skill-category p {
    color: var(--text-tertiary);
    font-size: 0.95rem;
    margin: 0;
}

.profile-card {
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl), var(--glow-primary);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    margin: 0 auto var(--space-6);
}

.profile-name {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.profile-title {
    color: var(--primary-500);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-4);
}

.profile-location {
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin: 0;
}

/* ===== PROJECTS SECTION ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

@media (min-width: 1280px) {
    .projects-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl), var(--glow-purple);
    border-color: rgba(99, 102, 241, 0.3);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(14, 165, 233, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.project-card:hover::before {
    opacity: 1;
}

.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-600);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    z-index: 9999;
}

.skip-to-content:focus {
    top: 0;
}

.project-header {
    height: 200px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-header-image {
    padding: 0;
}

.project-header-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.project-header.web {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.project-header.mobile {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.project-header.security {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.project-header.network {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.project-icon {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.9);
    transition: var(--transition-normal);
}

.project-card:hover .project-icon {
    transform: scale(1.1) rotate(5deg);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.project-card:hover .project-header-img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: var(--space-6);
    text-align: center;
    transform: translateY(100%);
    transition: var(--transition-normal);
}

.project-card:hover .project-overlay {
    transform: translateY(0);
}

.project-overlay-title {
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.project-body {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-4);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    margin-bottom: var(--space-6);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.tech-tag {
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-fast);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

/* Technology-specific colors */
.tech-tag.laravel {
    background: linear-gradient(135deg, #ff2d20, #ff6b35);
    color: white;
}

.tech-tag.vue {
    background: linear-gradient(135deg, #4fc08d, #35495e);
    color: white;
}

.tech-tag.php {
    background: linear-gradient(135deg, #777bb4, #4f5b93);
    color: white;
}

.tech-tag.javascript {
    background: linear-gradient(135deg, #f7df1e, #323330);
    color: #000;
}

.tech-tag.flutter {
    background: linear-gradient(135deg, #02569b, #0468d7);
    color: white;
}

.tech-tag.dart {
    background: linear-gradient(135deg, #0175c2, #13b9fd);
    color: white;
}

.tech-tag.csharp {
    background: linear-gradient(135deg, #239120, #68217a);
    color: white;
}

.tech-tag.mysql {
    background: linear-gradient(135deg, #00758f, #f29111);
    color: white;
}

.tech-tag.postgresql {
    background: linear-gradient(135deg, #336791, #2d5d7b);
    color: white;
}

.tech-tag.mongodb {
    background: linear-gradient(135deg, #47a248, #3e8e41);
    color: white;
}

.tech-tag.nodejs {
    background: linear-gradient(135deg, #5fa04e, #026e00);
    color: white;
    border: 1px solid rgba(95, 160, 78, 0.3);
}

.tech-tag.express {
    background: linear-gradient(135deg, #1a1a1a, #444444);
    color: white;
    border: 1px solid rgba(68, 68, 68, 0.5);
}

.tech-tag.docker {
    background: linear-gradient(135deg, #0db7ed, #0a75b8);
    color: white;
}

.tech-tag.owasp {
    background: linear-gradient(135deg, #f7b733, #fc4a1a);
    color: #1f2937;
}

.tech-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== CERTIFICATIONS SECTION ===== */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

@media (min-width: 1280px) {
    .cert-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.section#certifications {
    background: radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.08), transparent 40%),
        radial-gradient(circle at 80% 0%, rgba(14, 165, 233, 0.06), transparent 35%),
        linear-gradient(180deg, #ffffff 0%, #f8fbff 60%, #f4f7ff 100%);
}

.cert-card {
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--primary-100);
    box-shadow: 0 12px 30px rgba(59, 130, 246, 0.08);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-normal);
}

.cert-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2xl), var(--glow-primary);
}

.cert-image {
    background: var(--bg-secondary);
    height: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--primary-50);
}

.cert-image img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.cert-body {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    flex: 1;
}

.cert-badge {
    align-self: flex-start;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--primary-700);
    box-shadow: none;
    border: 1px solid var(--primary-100);
}

.cert-badge.blue {
    background: rgba(59, 130, 246, 0.12);
    color: #1d4ed8;
    border-color: rgba(59, 130, 246, 0.2);
}

.cert-badge.navy {
    background: rgba(30, 64, 175, 0.12);
    color: #1e3a8a;
    border-color: rgba(30, 64, 175, 0.2);
}

.cert-badge.teal {
    background: rgba(14, 165, 233, 0.14);
    color: #0f172a;
    border-color: rgba(14, 165, 233, 0.22);
}

.cert-badge.green {
    background: rgba(34, 197, 94, 0.12);
    color: #166534;
    border-color: rgba(34, 197, 94, 0.22);
}

.cert-badge.gold {
    background: rgba(245, 158, 11, 0.14);
    color: #92400e;
    border-color: rgba(245, 158, 11, 0.22);
}

.cert-title {
    font-size: 1.05rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    line-height: 1.4;
}

.cert-meta {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

.cert-actions {
    padding: 0 var(--space-6) var(--space-6);
    display: flex;
    gap: var(--space-3);
}

.cert-link {
    flex: 1;
    justify-content: center;
    border: 2px solid var(--primary-500);
    color: var(--primary-700);
    background: #fff;
    transition: all 0.3s ease;
}

.cert-link:hover {
    background: var(--primary-600);
    color: white;
    border-color: var(--primary-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.cert-badge {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cert-card:nth-child(1) .cert-badge { animation-delay: 0.1s; }
.cert-card:nth-child(2) .cert-badge { animation-delay: 0.2s; }
.cert-card:nth-child(3) .cert-badge { animation-delay: 0.3s; }
.cert-card:nth-child(4) .cert-badge { animation-delay: 0.4s; }


/* ===== TECHNOLOGIES SECTION ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-6);
    max-width: 1000px;
    margin: var(--space-12) auto 0;
}

.tech-item {
    text-align: center;
    padding: var(--space-6);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.tech-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: var(--transition-slow);
}

.tech-item:hover::before {
    left: 100%;
}

.tech-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--glow-primary);
    background: var(--bg-elevated);
}

.tech-item-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-4);
    transition: var(--transition-normal);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.25));
}

.tech-item:hover .tech-item-icon {
    transform: scale(1.2);
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.4));
}

.tech-item-name {
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.tech-item:hover .tech-item-name {
    color: var(--text-primary);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
    color: white;
    text-decoration: none;
}

.btn-outline {
    background: white;
    color: var(--primary-600);
    border: 2px solid var(--primary-500);
    font-weight: var(--font-weight-semibold);
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.1);
}

.btn-outline:hover {
    background: var(--primary-600);
    color: white;
    border-color: var(--primary-700);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

/* ===== CONTACT SECTION ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.contact-item {
    background: var(--bg-card);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: var(--transition-normal);
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--glow-primary);
}

.contact-icon {
    font-size: 2.5rem;
    color: var(--primary-500);
    margin-bottom: var(--space-4);
}

.contact-item h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-3);
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-tertiary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-12) 0;
    text-align: center;
}

.footer p {
    color: var(--text-tertiary);
    margin: var(--space-2) 0;
}

/* ===== ANIMATIONS ===== */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}


/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }

    .navbar-toggle {
        display: block;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-12);
    }

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-12);
    }
}

@media (min-width: 992px) and (max-width: 1366px) {
    .logo {
        font-size: 1.15rem;
    }
}

@media (max-width: 768px) {
    .nav {
        text-align: center;
    }

    .logo {
        flex: 1 1 100%;
        margin-bottom: 10px;
    }

    .social-nav {
        flex: 1 1 100%;
        justify-content: center;
        margin: 0 0 10px 0;
    }

    .hero-text h1 {
        font-size: clamp(1.8rem, 6vw, 2.2rem);
        line-height: 1.2;
        margin-top: 80px;
    }

    .hero-text p {
        font-size: 1rem;
    }

    .hero .profile-avatar {
        width: 250px;
        height: 250px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        min-width: 200px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: var(--space-4);
    }
}

@media (max-width: 480px) {

    .nav {
        padding: 0;
    }

    .hero-text h1 {
        font-size: 1.6rem;
        margin-top: 100px;
    }

    .hero .profile-avatar {
        width: 200px;
        height: 200px;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.nav-links a:focus,
.btn:focus,
.social-nav a:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}