/* ========================================
   PORTFOLIO — PREMIUM DARK THEME
   Jose Juan Dos Reis De Conceicao
   ======================================== */

/* --- Design Tokens --- */
:root {
    --bg-primary: #06080d;
    --bg-secondary: #0c0f18;
    --bg-card: rgba(15, 20, 35, 0.65);
    --bg-card-hover: rgba(20, 28, 50, 0.75);
    --border-subtle: rgba(100, 160, 255, 0.08);
    --border-hover: rgba(96, 165, 250, 0.25);

    --text-primary: #e8edf5;
    --text-secondary: #8892a8;
    --text-muted: #5a6278;

    --accent: #60a5fa;
    --accent-bright: #93c5fd;
    --accent-dim: #3b82f6;
    --accent-glow: rgba(96, 165, 250, 0.35);
    --accent-glow-strong: rgba(96, 165, 250, 0.55);

    --gradient-accent: linear-gradient(135deg, #3b82f6, #60a5fa, #93c5fd);
    --gradient-card: linear-gradient(135deg, rgba(15, 20, 40, 0.8), rgba(10, 14, 30, 0.6));
    --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 60%);

    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;

    --navbar-height: 72px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(96, 165, 250, 0.15);
    --shadow-glow-strong: 0 0 50px rgba(96, 165, 250, 0.25);

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

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

ul { list-style: none; }
img { max-width: 100%; display: block; }

::selection {
    background: var(--accent-dim);
    color: white;
}

/* --- Utilities --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2.5px;
    margin-bottom: 16px;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 50px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

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

/* --- Glassmorphism Card --- */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

/* ================================================
   NAVBAR
   ================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background: rgba(6, 8, 13, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    display: flex;
    align-items: center;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(6, 8, 13, 0.92);
    border-bottom-color: var(--border-subtle);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.92rem;
    letter-spacing: 0.3px;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width var(--transition-base);
}

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

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

.nav-cv-btn {
    padding: 8px 20px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 50px;
    color: var(--accent) !important;
    font-weight: 600;
    font-size: 0.88rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-base);
}

.nav-cv-btn::after { display: none !important; }

.nav-cv-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.2);
}

/* Burger Menu */
.burger {
    display: none;
    cursor: pointer;
    z-index: 1001;
    padding: 4px;
}

.burger div {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: all var(--transition-base);
    border-radius: 2px;
}

.toggle .line1 { transform: rotate(-45deg) translate(-5px, 6px); }
.toggle .line2 { opacity: 0; }
.toggle .line3 { transform: rotate(45deg) translate(-5px, -6px); }

/* ================================================
   HERO SECTION
   ================================================ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: calc(var(--navbar-height) + 40px);
    padding-bottom: 60px;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* Animated grid background */
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(96, 165, 250, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

/* Hero avatar */
.hero-avatar {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    margin: 0 auto 32px;
    position: relative;
}

.hero-avatar::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient-accent);
    z-index: -1;
    opacity: 0.7;
}

.hero-avatar::after {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: -2;
    animation: avatarGlow 3s ease-in-out infinite;
}

@keyframes avatarGlow {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.08); }
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-primary);
}

/* Status badge */
.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(34, 197, 94, 0.08);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 50px;
    font-size: 0.82rem;
    color: #4ade80;
    font-weight: 500;
    margin-bottom: 28px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4ade80;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(74, 222, 128, 0); }
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.hero-name {
    font-size: 4.2rem;
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: 16px;
    letter-spacing: -1.5px;
}

.hero-role {
    font-size: 1.35rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 28px;
    line-height: 1.5;
}

.hero-role strong {
    color: var(--accent-bright);
    font-weight: 600;
}

/* Tech chips */
.hero-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}

.hero-chip {
    padding: 7px 18px;
    background: rgba(96, 165, 250, 0.06);
    border: 1px solid rgba(96, 165, 250, 0.12);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-base);
}

.hero-chip:hover {
    background: rgba(96, 165, 250, 0.12);
    border-color: rgba(96, 165, 250, 0.3);
    color: var(--accent-bright);
    transform: translateY(-2px);
}

/* Hero buttons */
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 50px;
}

.btn {
    padding: 13px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--accent-dim);
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: var(--accent);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-hover);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(96, 165, 250, 0.08);
    border-color: var(--accent);
    transform: translateY(-3px);
}

/* Scroll indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.78rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-indicator svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-muted);
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ================================================
   ABOUT SECTION
   ================================================ */
.about-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-text .text-highlight {
    color: var(--accent-bright);
    font-weight: 600;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

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

.stat-card:hover::after {
    transform: scaleX(1);
}

.stat-icon {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-family: var(--font-heading);
}

.stat-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* ================================================
   PROJECTS SECTION
   ================================================ */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.project-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.project-preview {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 16px;
    aspect-ratio: 16/9;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.project-preview-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

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

.project-card:hover .project-preview-overlay {
    opacity: 1;
}

/* Layout horizontal con imagen a la izquierda */
.project-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 20px;
}

.project-preview {
    flex-shrink: 0;
    width: 200px;
    height: 130px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    filter: brightness(0.85);
}

.project-card:hover .project-img {
    transform: scale(1.05);
    filter: brightness(1);
}

.project-content {
    flex: 1;
    min-width: 0; /* evita overflow del texto */
}

/* Responsive: en móvil vuelve a columna */
@media (max-width: 600px) {
    .project-card {
        flex-direction: column;
    }

    .project-preview {
        width: 100%;
        height: 160px;
    }
}

.project-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
}

.project-badge {
    padding: 4px 14px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-badge.production {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

.project-badge.in-progress {
    background: rgba(251, 191, 36, 0.1);
    border-color: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
}

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

.project-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.project-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(59, 130, 246, 0.08);
}

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

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.project-tag {
    padding: 5px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.project-tag:hover {
    border-color: var(--accent-dim);
    color: var(--accent-bright);
}

/* ================================================
   EXPERIENCE & EDUCATION SECTION
   ================================================ */
.timeline {
    position: relative;
    max-width: 750px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 0;
    height: 100%;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-dim), var(--border-subtle));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

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

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-dim);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    z-index: 2;
}

.timeline-date {
    font-size: 0.82rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
    transform: translateX(4px);
}

.timeline-content h3 {
    font-size: 1.15rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.timeline-content h4 {
    font-size: 0.92rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 14px;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    padding-left: 18px;
    position: relative;
    margin-bottom: 6px;
}

.timeline-content li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-dim);
    font-size: 0.85rem;
}

/* Education cards */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 750px;
    margin: 50px auto 0;
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition-base);
}

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

.education-card .edu-icon {
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.education-card h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.education-card .school {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 4px;
    font-weight: 500;
}

.education-card .date {
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ================================================
   CERTIFICATIONS SECTION
   ================================================ */
.certifications-section {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.certifications-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.certifications-grid {
    display: flex;
    flex-direction: column;
    gap: 28px;
    max-width: 850px;
    margin: 0 auto;
}

.certification-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    background: var(--gradient-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.certification-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.3), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.certification-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #00bceb, #049fd9, #0076d5);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.certification-card:hover::before,
.certification-card:hover::after {
    opacity: 1;
}

/* Badge container */
.cert-badge-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    position: relative;
    width: 90px;
    padding-top: 8px;
}

.cert-badge-glow {
    position: absolute;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 188, 235, 0.15) 0%, transparent 70%);
    animation: certGlow 3s ease-in-out infinite;
    top: 0;
    left: 0;
}

@keyframes certGlow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.15); }
}

.cert-issuer-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(0, 188, 235, 0.15), rgba(4, 159, 217, 0.08));
    border: 1px solid rgba(0, 188, 235, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #00bceb;
    position: relative;
    z-index: 1;
    transition: all var(--transition-base);
}

.certification-card:hover .cert-issuer-icon {
    border-color: rgba(0, 188, 235, 0.5);
    box-shadow: 0 0 25px rgba(0, 188, 235, 0.2);
}

/* Cert content */
.cert-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cert-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.cert-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.cert-verified-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.25);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #4ade80;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    flex-shrink: 0;
}

.cert-issuer {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.cert-issuer strong {
    color: #00bceb;
    font-weight: 600;
}

.cert-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.cert-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.cert-skill {
    padding: 5px 14px;
    background: rgba(0, 188, 235, 0.06);
    border: 1px solid rgba(0, 188, 235, 0.12);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.cert-skill:hover {
    border-color: rgba(0, 188, 235, 0.4);
    color: #00bceb;
    background: rgba(0, 188, 235, 0.1);
    transform: translateY(-2px);
}

.cert-meta {
    display: flex;
    gap: 20px;
    margin-top: 6px;
}

.cert-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Certification responsive */
@media (max-width: 600px) {
    .certification-card {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 24px;
    }
    
    .cert-badge-container {
        justify-content: flex-start;
        width: auto;
    }
    
    .cert-title {
        font-size: 1.2rem;
    }
    
    .cert-header {
        flex-direction: column;
        gap: 8px;
    }
}

/* ================================================
   TECH STACK SECTION
   ================================================ */
.tech-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.tech-category {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 30px;
    transition: all var(--transition-base);
}

.tech-category:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.tech-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 22px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-subtle);
}

.tech-category-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-size: 1.15rem;
}

.tech-category-icon.frontend { background: rgba(59, 130, 246, 0.12); }
.tech-category-icon.backend { background: rgba(168, 85, 247, 0.12); }
.tech-category-icon.data { background: rgba(249, 115, 22, 0.12); }
.tech-category-icon.tools { background: rgba(34, 197, 94, 0.12); }
.tech-category-icon.datascience { background: rgba(0, 188, 235, 0.12); }
.tech-category-icon.languages { background: rgba(236, 72, 153, 0.12); }

.tech-category-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tech-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-pill {
    padding: 7px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tech-pill:hover {
    border-color: var(--accent-dim);
    color: var(--accent-bright);
    background: rgba(59, 130, 246, 0.08);
    transform: translateY(-2px);
}

/* ================================================
   CONTACT SECTION
   ================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info {
    padding: 10px 0;
}

.contact-intro {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.8;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    transition: all var(--transition-base);
}

.contact-card:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
    box-shadow: var(--shadow-glow);
}

.contact-card-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    color: var(--accent);
    flex-shrink: 0;
}

.contact-card-icon svg {
    width: 20px;
    height: 20px;
}

.contact-card-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 2px;
}

.contact-card-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Contact form */
.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.form-input,
.form-textarea {
    padding: 13px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all var(--transition-base);
    outline: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent-dim);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    padding: 14px 36px;
    background: var(--accent-dim);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    font-family: var(--font-body);
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    align-self: flex-start;
}

.btn-submit:hover {
    background: var(--accent);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.35);
    transform: translateY(-2px);
}

/* ================================================
   FOOTER
   ================================================ */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 60px 0 30px;
    background: var(--bg-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-top: 12px;
    max-width: 320px;
}

.footer-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-links a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid var(--border-subtle);
    padding-top: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ================================================
   ANIMATIONS
   ================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* Stagger children animation */
.stagger-children > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.15s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.25s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 0.35s; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 0.4s; }

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* Typing cursor blink */
.typed-cursor {
    display: inline-block;
    width: 3px;
    height: 1.1em;
    background: var(--accent);
    margin-left: 4px;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Counter animation */
@keyframes countUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ================================================
   RESPONSIVE — TABLET
   ================================================ */
@media (max-width: 968px) {
    .section { padding: 90px 0; }
    .section-title { font-size: 2.2rem; }
    .hero-name { font-size: 3.2rem; }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

/* ================================================
   RESPONSIVE — MOBILE
   ================================================ */
@media (max-width: 768px) {
    html { font-size: 15px; }
    
    .container { padding: 0 20px; }
    .section { padding: 70px 0; }
    .section-title { font-size: 1.9rem; }
    .section-header { margin-bottom: 50px; }

    /* Mobile Nav */
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        background: #06080d;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 0;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 999;
        overflow-y: auto;
        padding: 100px 24px 40px;
    }

    .nav-links.nav-active {
        transform: translateX(0);
    }

    .nav-links li {
        width: 100%;
        max-width: 320px;
        text-align: center;
    }

    .nav-links a {
        font-size: 1.15rem;
        color: var(--text-secondary);
        display: block;
        padding: 16px 12px;
        border-radius: var(--radius-sm);
        transition: all var(--transition-base);
        font-weight: 500;
        letter-spacing: 0.3px;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: var(--text-primary);
        background: rgba(96, 165, 250, 0.08);
    }

    .nav-links a::after {
        display: none;
    }

    .nav-links li:last-child {
        margin-top: 16px;
    }

    .nav-links .nav-cv-btn {
        width: 100% !important;
        max-width: 320px;
        height: auto !important;
        padding: 14px 24px;
        font-size: 0.95rem;
        justify-content: center;
        border-radius: 50px;
    }

    .burger {
        display: block;
        position: relative;
        z-index: 1001;
    }

    /* Hero mobile */
    .hero-section {
        padding-top: calc(var(--navbar-height) + 30px);
        min-height: auto;
        padding-bottom: 50px;
    }

    .hero-name {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }

    .hero-role { font-size: 1.1rem; }
    .hero-avatar { width: 110px; height: 110px; }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    /* About mobile */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }

    .stat-card { padding: 18px 14px; }
    
    /* Projects mobile */
    .project-card { padding: 24px; }
    .project-title { font-size: 1.25rem; }

    /* Timeline mobile */
    .timeline { padding-left: 30px; }
    .timeline::before { left: 8px; }
    .timeline-dot { left: -27px; }
    .timeline-content { padding: 22px; }

    /* Tech mobile */
    .tech-grid {
        grid-template-columns: 1fr;
    }

    /* Contact mobile */
    .contact-form-wrapper { padding: 24px; }

    /* Footer mobile */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2rem; }
    .hero-chips { gap: 6px; }
    .hero-chip { padding: 5px 12px; font-size: 0.78rem; }
    .stats-grid { grid-template-columns: 1fr; }
    .education-grid { grid-template-columns: 1fr; }
}

/* ================================================
   CURSOR GLOW EFFECT
   ================================================ */
.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
    opacity: 0;
}

.cursor-glow.active {
    opacity: 1;
}

/* ================================================
   PARTICLE CANVAS
   ================================================ */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}