/* ==========================================
   JORGE VALDERRABANO — PORTFOLIO
   Modern Dark Theme with Violet Accents
   ========================================== */

/* ---------- DESIGN TOKENS ---------- */
:root {
    --bg-primary: #0a0a0a;
    --bg-surface: #111111;
    --bg-card: #1a1a1a;
    --bg-card-hover: #222222;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --accent-dark: #7c3aed;
    --accent-glow: rgba(139, 92, 246, 0.3);
    --accent-subtle: rgba(139, 92, 246, 0.08);
    --gradient: linear-gradient(135deg, #7c3aed, #a78bfa, #c4b5fd);
    --gradient-text: linear-gradient(90deg, #a78bfa, #c4b5fd, #e0d7fe);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.15);
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --nav-height: 70px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover { color: var(--accent); }

img {
    max-width: 100%;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    color: inherit;
}

ul { list-style: none; }

/* ---------- NOISE TEXTURE ---------- */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-normal);
}

.nav__inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-decoration: none;
    display: flex;
    gap: 2px;
}

.nav__logo-j { color: var(--text-primary); }
.nav__logo-v { color: var(--accent); }

.nav__links {
    display: flex;
    gap: 8px;
}

.nav__link {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.nav__link:hover,
.nav__link.active {
    color: var(--text-primary);
    background: var(--accent-subtle);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    letter-spacing: 0.5px;
}

.lang-toggle:hover {
    border-color: var(--accent);
    color: var(--accent-light);
    background: var(--accent-subtle);
}

.lang-toggle__flag { font-size: 1rem; }

/* Hamburger */
.nav__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.nav__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.nav__hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav__hamburger.open span:nth-child(2) {
    opacity: 0;
}
.nav__hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

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

.hero__bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(139, 92, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__ascii {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.35;
    pointer-events: none;
}

.hero__content {
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 24px;
}

.hero__photo-wrapper {
    width: 140px;
    height: 140px;
    margin: 0 auto 32px;
    position: relative;
    border-radius: 50%;
    padding: 4px;
    background: var(--gradient);
    animation: photo-pulse 3s ease-in-out infinite;
}

@keyframes photo-pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(139, 92, 246, 0.3); }
    50% { box-shadow: 0 0 40px rgba(139, 92, 246, 0.5), 0 0 80px rgba(139, 92, 246, 0.2); }
}

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

.hero__name {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: 4px;
    line-height: 1.05;
    margin-bottom: 16px;
}

.hero__name-line {
    display: block;
    font-size: clamp(2.8rem, 7vw, 5.5rem);
}

.hero__name-line:last-child {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.hero__accent-line {
    width: 60px;
    height: 3px;
    background: var(--gradient);
    margin: 0 auto 32px;
    border-radius: 2px;
}

.hero__cta {
    margin-bottom: 32px;
}

.hero__socials {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.hero__socials a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}

.hero__socials a:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--accent-subtle);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.hero__scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: float 2s ease-in-out infinite;
}

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

/* ==========================================
   SECTION BASE STYLES
   ========================================== */
.section {
    padding: 100px 24px;
    position: relative;
}

.section__inner {
    max-width: 1280px;
    margin: 0 auto;
}

.section__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient);
    border-radius: 2px;
}

.section__subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 48px;
    max-width: 600px;
}

/* Section backgrounds alternation */
.about { background: var(--bg-surface); }
.education { background: var(--bg-primary); }
.experience { background: var(--bg-surface); }
.projects { background: var(--bg-primary); }
.contact { background: var(--bg-surface); }

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about__grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
    margin-bottom: 80px;
    align-items: start;
}

.about__photo-col {
    position: relative;
}

.about__photo {
    width: 100%;
    border-radius: var(--radius-lg);
    object-fit: cover;
    aspect-ratio: 3/4;
    border: 2px solid rgba(139, 92, 246, 0.2);
}

.about__photo-glow {
    position: absolute;
    inset: -10px;
    border-radius: var(--radius-lg);
    background: var(--gradient);
    opacity: 0.08;
    z-index: -1;
    filter: blur(20px);
}

.about__project-count {
    text-align: center;
    margin-top: 20px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.about__project-count:hover {
    border-color: rgba(139, 92, 246, 0.2);
    box-shadow: var(--shadow-glow);
}

.about__project-count-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 4px;
}

.about__project-count-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about__bio {
    margin-bottom: 32px;
}

.about__bio p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 14px;
    line-height: 1.7;
}

.about__bio p strong {
    color: var(--accent-light);
}

.about__details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

.about__detail-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.about__detail-item i {
    color: var(--accent);
    font-size: 1.1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.about__detail-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.about__detail-value {
    font-size: 0.9rem;
    font-weight: 500;
}

.about__badge {
    background: var(--accent-subtle);
    color: var(--accent-light);
    padding: 2px 10px;
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.about__cv-btn {
    margin-top: 8px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn--primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
    color: #fff;
}

.btn--outline {
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    background: transparent;
}

.btn--outline:hover {
    border-color: var(--accent);
    background: var(--accent-subtle);
    color: var(--accent-light);
}

/* ==========================================
   SKILLS GRID
   ========================================== */
.about__skills {
    margin-bottom: 60px;
}

.about__skills-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    cursor: default;
    user-select: none;
}

.skill-tag:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: var(--bg-card-hover);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

.skill-tag__icon {
    font-size: 1.1rem;
    color: var(--accent);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.skill-tag:hover .skill-tag__icon {
    transform: rotate(360deg) scale(1.2);
}

/* Animate skill icons on scroll */
.skill-tag.animated .skill-tag__icon {
    animation: icon-build 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes icon-build {
    0% { transform: scale(0) rotate(-180deg); opacity: 0; }
    50% { transform: scale(1.3) rotate(10deg); opacity: 1; }
    100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

/* ==========================================
   DRAGGABLE / RESIZABLE TEXT CARDS
   ========================================== */
.about__text-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.text-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
    resize: both;
    overflow: auto;
    min-width: 200px;
    min-height: 120px;
    max-width: 100%;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.text-card.dragging {
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
    opacity: 0.9;
    z-index: 100;
}

.text-card__handle {
    position: absolute;
    top: 8px;
    right: 8px;
    color: var(--text-muted);
    cursor: grab;
    font-size: 0.85rem;
    padding: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.text-card:hover .text-card__handle { opacity: 1; }
.text-card:active .text-card__handle { cursor: grabbing; }

.text-card h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--accent-light);
}

.text-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ==========================================
   TIMELINE (Education & Experience)
   ========================================== */
.timeline {
    position: relative;
    padding-left: 40px;
    max-width: 800px;
}

.timeline--left { margin-left: 0; }
.timeline--right { margin-left: auto; }

/* Timeline card base styling */
.timeline__item {
    margin-bottom: 20px;
}

.timeline__item:last-child {
    margin-bottom: 0;
}

.timeline__card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 24px 24px 34px;
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.timeline__logo {
    width: 150px;
    height: 150px;
    object-fit: contain;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    margin-top: 4px;
    background: rgba(255, 255, 255, 0.06);
    padding: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.timeline__card-body {
    flex: 1;
    min-width: 0;
}

.timeline__card:hover {
    border-color: rgba(139, 92, 246, 0.2);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.timeline__year {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-light);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 6px;
    padding: 2px 10px;
    background: var(--accent-subtle);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(139, 92, 246, 0.15);
}

.timeline__title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.timeline__institution {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.timeline__desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Education: two-column grid with sticky title */
.education__grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: start;
}

.education__left {
    position: sticky;
    top: calc(var(--nav-height) + 40px);
    z-index: 10;
    padding-top: 8px;
}

.education__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: 1px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.education__accent-line {
    width: 50px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
    margin-top: 16px;
}

.education__right {
    min-width: 0;
}

.timeline--edu {
    padding-left: 40px;
    max-width: 100%;
}

.timeline--edu .timeline__line {
    left: 14px;
    right: auto;
}

.timeline--edu .timeline__marker {
    left: -33px;
    right: auto;
}

.timeline--edu .timeline__card {
    text-align: left;
}

.timeline--edu .timeline__year {
    margin-right: 0;
}

.timeline--edu .timeline__institution {
    margin-bottom: 8px;
}

/* ==========================================
   EXPERIENCE (mirrors Education grid layout)
   ========================================== */
.experience__grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: start;
}

.experience__left {
    position: sticky;
    top: calc(var(--nav-height) + 40px);
    z-index: 10;
    padding-top: 8px;
}

.experience__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: 1px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.experience__accent-line {
    width: 50px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
    margin-top: 16px;
}

.experience__right {
    min-width: 0;
}

.timeline--exp {
    padding-left: 40px;
    max-width: 100%;
}

.timeline--exp .timeline__line {
    left: 14px;
    right: auto;
}

.timeline--exp .timeline__marker {
    left: -33px;
    right: auto;
}

.timeline--exp .timeline__card {
    text-align: left;
}

.timeline--exp .timeline__year {
    margin-right: 0;
}

.timeline--exp .timeline__institution {
    margin-bottom: 8px;
}

/* ==========================================
   PROJECTS
   ========================================== */
.projects__filters {
    display: flex;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.filter-btn-c {
    padding: 8px 20px;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition-fast);
}

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

.filter-btn-c.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 80px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

.project-card__image {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    filter: grayscale(40%);
    transition: all var(--transition-normal);
}

.project-card:hover .project-card__image {
    filter: grayscale(0%);
    transform: scale(1.03);
}

.project-card__image-wrapper {
    overflow: hidden;
}

.project-card__body {
    padding: 20px;
}

.project-card__name {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.project-card__desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

.project-card__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-light);
    transition: all var(--transition-fast);
    letter-spacing: 0.3px;
}

.project-card__link:hover {
    color: var(--accent);
    gap: 10px;
}

.project-card__link i {
    font-size: 0.7rem;
}

/* ==========================================
   CERTIFICATE BUTTON (inside timeline cards)
   ========================================== */
.cert-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 8px 18px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-light);
    background: var(--accent-subtle);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.3px;
}

.cert-btn:hover {
    background: rgba(139, 92, 246, 0.15);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.cert-btn:active {
    transform: translateY(0);
}

/* ==========================================
   CERTIFICATE LIGHTBOX
   ========================================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 24px;
}

.lightbox.open {
    opacity: 1;
    pointer-events: auto;
}

.lightbox__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.lightbox__content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox.open .lightbox__content {
    transform: scale(1);
}

.lightbox__image {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox__close {
    position: absolute;
    top: -44px;
    right: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    color: #fff;
    font-size: 1.3rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lightbox__close:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--accent);
    color: var(--accent-light);
}

/* ==========================================
   GitHub Projects
   ========================================== */
.projects__github {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.projects__github-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.projects__github-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.github-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all var(--transition-normal);
}

.github-card:hover {
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
}

.github-card__name {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--accent-light);
}

.github-card__desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 12px;
}

.github-card__meta {
    display: flex;
    gap: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.github-card__meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.github-card__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-light);
    margin-top: 12px;
}

.github-card__link:hover {
    color: var(--accent);
}

/* ==========================================
   CONTACT
   ========================================== */
.contact__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}

.contact__card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

.contact__card:hover {
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.contact__card i {
    font-size: 1.6rem;
    color: var(--accent);
    margin-bottom: 12px;
}

.contact__card h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.contact__card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.contact__card a:hover { color: var(--accent); }

.contact__socials {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.contact__socials a {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.15rem;
    transition: all var(--transition-normal);
}

.contact__socials a:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--accent-subtle);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 24px 24px;
    text-align: center;
    position: relative;
}

.footer__inner p {
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-bottom: 20px;
}

.footer__socials {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.footer__socials a {
    color: var(--text-muted);
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.footer__socials a:hover { color: var(--accent-light); }

.footer__top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    color: #fff;
    border-radius: 50%;
    font-size: 1rem;
    box-shadow: 0 4px 20px var(--accent-glow);
    transition: all var(--transition-normal);
    z-index: 100;
    text-decoration: none;
}

.footer__top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
    color: #fff;
}

/* ==========================================
   SCROLL ANIMATIONS
   ========================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Timeline animation variants */
.timeline--left .animate-on-scroll {
    transform: translateX(-40px);
}
.timeline--left .animate-on-scroll.visible {
    transform: translateX(0);
}

.timeline--right .animate-on-scroll {
    transform: translateX(40px);
}
.timeline--right .animate-on-scroll.visible {
    transform: translateX(0);
}

/* Project cards stagger */
.project-card.animate-on-scroll {
    transform: translateY(40px) rotate(1deg);
}
.project-card.animate-on-scroll.visible {
    transform: translateY(0) rotate(0deg);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
    .about__grid {
        grid-template-columns: 220px 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav__links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-normal);
    }

    .nav__links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav__link {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .nav__hamburger { display: flex; }

    .hero__name-line {
        letter-spacing: 2px;
    }

    .about__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about__photo-col {
        max-width: 300px;
        margin: 0 auto;
    }

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

    .about__text-cards {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline__line { left: 8px; }
    .timeline__marker { left: -27px; width: 10px; height: 10px; }

    .projects__grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 16px;
    }

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

    .section { padding: 70px 20px; }

    .education__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .education__left {
        position: relative;
        top: auto;
        padding-top: 0;
    }

    .education__title {
        font-size: clamp(1.8rem, 6vw, 2.2rem);
    }

    .experience__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .experience__left {
        position: relative;
        top: auto;
        padding-top: 0;
    }

    .experience__title {
        font-size: clamp(1.8rem, 6vw, 2.2rem);
    }

    .timeline--edu {
        padding-left: 30px;
    }

    .timeline--edu .timeline__line { left: 8px; }
    .timeline--edu .timeline__marker { left: -27px; width: 10px; height: 10px; }

    .timeline--exp {
        padding-left: 30px;
    }

    .timeline--exp .timeline__line { left: 8px; }
    .timeline--exp .timeline__marker { left: -27px; width: 10px; height: 10px; }

    .timeline__card {
        flex-direction: column;
        gap: 12px;
        padding: 20px;
    }

    .timeline__logo {
        width: 150px;
        height: 150px;
        padding: 8px;
        margin-top: 0;
    }
}

@media (max-width: 480px) {
    .hero__name-line {
        letter-spacing: 1px;
    }

    .hero__photo-wrapper {
        width: 110px;
        height: 110px;
        margin-bottom: 24px;
    }

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

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

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

    .skills-grid { gap: 8px; }

    .skill-tag {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
}