@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap");

/* ============================================================
   AHMAD DARWISH PORTFOLIO — MODERN DESIGN SYSTEM
   Edit colors in :root to retheme the entire site instantly.
   ============================================================ */

/* ── Max-width content wrapper ───────────────────────────── */
/* Applied inside each section to cap width on ultra-wide screens */
.section-inner {
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
}

/* ── CSS Variables ────────────────────────────────────────── */
:root {
    /* Backgrounds */
    --bg-base: #030d1a;
    --bg-surface: #071426;
    --bg-card: #0b1d35;
    --bg-card-hover: #0f2340;
    --bg-nav: rgba(3, 13, 26, 0.96);

    /* Accent */
    --accent: #00d4ff;
    --accent-dim: rgba(0, 212, 255, 0.15);
    --accent-glow: rgba(0, 212, 255, 0.35);
    --accent2: #6366f1;
    --accent2-dim: rgba(99, 102, 241, 0.15);
    --gradient: linear-gradient(135deg, #00d4ff 0%, #6366f1 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff 0%, #818cf8 100%);

    /* Text */
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    --text-accent: #00d4ff;

    /* Borders */
    --border: rgba(148, 163, 184, 0.1);
    --border-accent: rgba(0, 212, 255, 0.3);

    /* Nav */
    --nav-width: 260px;

    /* Typography */
    --font-heading: "Space Grotesk", system-ui, sans-serif;
    --font-body: "Inter", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", monospace;

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

    /* Shadows */
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.2);
    --shadow-nav: 4px 0 32px rgba(0, 0, 0, 0.5);

    /* Radii */
    --radius: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Spacing */
    --section-py: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 20px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

body.nav-open {
    overflow: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
}
ul {
    list-style: none;
}
button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
    background: var(--border-accent);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ── Preloader ───────────────────────────────────────────── */
#preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-base);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition:
        opacity 0.5s ease,
        visibility 0.5s ease;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-ring {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ── Sidebar Navigation ──────────────────────────────────── */
#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--nav-width);
    height: 100vh;
    background: var(--bg-nav);
    border-right: 1px solid var(--border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    box-shadow: var(--shadow-nav);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

/* Sidebar brand */
.sidebar-brand {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    object-fit: cover;
    box-shadow: 0 0 16px var(--accent-glow);
    margin-bottom: 12px;
    transition: var(--transition);
}
.sidebar-avatar:hover {
    box-shadow: 0 0 28px var(--accent-glow);
    transform: scale(1.04);
}

.sidebar-name {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.sidebar-role {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--accent);
    margin-top: 4px;
    letter-spacing: 0.05em;
}

/* Status dot */
.sidebar-status {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%,
    100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
}

.status-text {
    font-size: 0.7rem;
    color: #10b981;
    font-family: var(--font-mono);
}

/* Nav links */
.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
}

.nav-section-label {
    font-size: 0.6rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 10px 12px 6px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
    margin-bottom: 2px;
}

.sidebar-nav a i {
    font-size: 1rem;
    width: 20px;
    flex-shrink: 0;
    transition: var(--transition);
}

.sidebar-nav a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--gradient);
    border-radius: 0 3px 3px 0;
    transition: var(--transition);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--accent);
    background: var(--accent-dim);
}

.sidebar-nav a:hover i,
.sidebar-nav a.active i {
    color: var(--accent);
    filter: drop-shadow(0 0 6px var(--accent-glow));
}

.sidebar-nav a.active::before {
    height: 60%;
}

/* Social links */
.sidebar-social {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.sidebar-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.sidebar-social a:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 1.3rem;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.nav-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* ── Main Content ────────────────────────────────────────── */
#main-content {
    margin-left: var(--nav-width);
    min-height: 100vh;
}

/* ── Section Base ────────────────────────────────────────── */
section {
    padding: var(--section-py) 60px;
    position: relative;
    overflow: hidden;
}

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

.section-header {
    margin-bottom: 56px;
    position: relative;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-tag::before {
    content: "";
    display: inline-block;
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 16px;
}

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

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 580px;
    line-height: 1.7;
}

/* Card */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient);
    opacity: 0;
    transition: var(--transition);
    border-radius: inherit;
}

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

.card:hover::before {
    opacity: 0.03;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    border: 1px solid;
    transition: var(--transition);
}

.badge-blue {
    color: #38bdf8;
    border-color: rgba(56, 189, 248, 0.3);
    background: rgba(56, 189, 248, 0.08);
}
.badge-purple {
    color: #a78bfa;
    border-color: rgba(167, 139, 250, 0.3);
    background: rgba(167, 139, 250, 0.08);
}
.badge-amber {
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.3);
    background: rgba(251, 191, 36, 0.08);
}
.badge-green {
    color: #34d399;
    border-color: rgba(52, 211, 153, 0.3);
    background: rgba(52, 211, 153, 0.08);
}
.badge-orange {
    color: #fb923c;
    border-color: rgba(251, 146, 60, 0.3);
    background: rgba(251, 146, 60, 0.08);
}
.badge-cyan {
    color: #00d4ff;
    border-color: rgba(0, 212, 255, 0.3);
    background: rgba(0, 212, 255, 0.08);
}
.badge-gray {
    color: #94a3b8;
    border-color: rgba(148, 163, 184, 0.3);
    background: rgba(148, 163, 184, 0.08);
}

/* ── Hero Section ────────────────────────────────────────── */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 40px 60px;
    background: var(--bg-base);
    position: relative;
    overflow: hidden;
}

/* Animated grid background */
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: grid-drift 20s linear infinite;
    pointer-events: none;
}

@keyframes grid-drift {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(60px, 60px);
    }
}

/* Glowing orbs */
.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    animation: orb-float 8s ease-in-out infinite alternate;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(
        circle,
        rgba(0, 212, 255, 0.12) 0%,
        transparent 70%
    );
    top: -150px;
    right: -100px;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(
        circle,
        rgba(99, 102, 241, 0.12) 0%,
        transparent 70%
    );
    bottom: -100px;
    left: 10%;
    animation-delay: -4s;
}

@keyframes orb-float {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(20px, -30px) scale(1.08);
    }
}

/* Hero content */
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hero-greeting::before {
    content: ">";
    font-weight: 700;
    animation: blink 1.2s step-end infinite;
}

@keyframes blink {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-role {
    font-family: var(--font-heading);
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 12px;
    min-height: 2em;
}

.hero-role .typed {
    color: var(--accent);
}
.hero-role .typed-cursor {
    color: var(--accent);
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 560px;
    line-height: 1.8;
    margin-bottom: 40px;
}

/* Hero CTA buttons */
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 44px;
}

.btn-primary-hero {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--gradient);
    color: #fff;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.15);
    opacity: 0;
    transition: var(--transition);
}

.btn-primary-hero:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--accent-glow);
}
.btn-primary-hero:hover::before {
    opacity: 1;
}

.btn-outline-hero {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-accent);
    background: transparent;
    transition: var(--transition);
}

.btn-outline-hero:hover {
    background: var(--accent-dim);
    color: var(--accent);
    transform: translateY(-2px);
    border-color: var(--accent);
}

/* Hero social */
.hero-social {
    display: flex;
    gap: 10px;
}

.hero-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition);
}

.hero-social a:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* Hero scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 0.7rem;
    font-family: var(--font-mono);
    letter-spacing: 0.1em;
    animation: fadeInUp 1s ease 1s both;
}

.scroll-mouse {
    width: 22px;
    height: 36px;
    border: 2px solid var(--border);
    border-radius: 11px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.scroll-wheel {
    width: 3px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    animation: scroll-anim 2s ease-in-out infinite;
}

@keyframes scroll-anim {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(12px);
    }
}

/* ── About Section ───────────────────────────────────────── */
#about {
    background: var(--bg-surface);
}

.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
    align-items: start;
}

.profile-img-wrap {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.profile-img-ring {
    position: relative;
    width: 220px;
    height: 220px;
}

.profile-img-ring::before {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient);
    animation: ring-spin 6s linear infinite;
    z-index: 0;
}

.profile-img-ring::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    background: var(--bg-surface);
    z-index: 1;
}

@keyframes ring-spin {
    to {
        transform: rotate(360deg);
    }
}

.profile-img {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    z-index: 2;
}

.profile-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.profile-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--accent-dim);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--accent);
    font-family: var(--font-mono);
}

/* About info */
.about-role {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.about-tagline {
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 0.95rem;
}

.bio-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
}

.bio-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.bio-item .bio-emoji {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.bio-item strong {
    color: var(--accent);
    font-weight: 600;
}

/* Languages */
.lang-grid {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.lang-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    transition: var(--transition);
}

.lang-card:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.lang-flag {
    font-size: 1.2rem;
}
.lang-name {
    font-weight: 600;
    color: var(--text-primary);
}
.lang-level {
    font-size: 0.75rem;
    color: var(--accent);
    font-family: var(--font-mono);
}

/* About CTA */
.about-cta {
    display: flex;
    gap: 12px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.btn-cv {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--gradient);
    color: #fff;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-cv:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--accent-glow);
    color: #fff;
}

/* ── Skills Section ──────────────────────────────────────── */
#skills {
    background: var(--bg-base);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.skill-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: var(--transition);
}

.skill-item:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.skill-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.skill-pct {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 500;
}

.skill-bar-track {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    border-radius: 3px;
    background: var(--gradient);
    width: 0%;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.skill-bar-fill::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.25) 50%,
        transparent 100%
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(200%);
    }
}

/* ── Resume / Experience Section ─────────────────────────── */
#resume {
    background: var(--bg-surface);
}

.resume-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

/* Timeline */
.timeline {
    position: relative;
}

.timeline-label {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.timeline-label i {
    color: var(--accent);
    font-size: 1.2rem;
}

.timeline-track {
    position: relative;
    padding-left: 28px;
}

.timeline-track::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        to bottom,
        var(--accent),
        var(--accent2),
        transparent
    );
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding: 20px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -22px;
    top: 22px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-base);
    border: 2px solid var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    transition: var(--transition);
}

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

.timeline-item:hover::before {
    background: var(--accent);
}

.tl-role {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tl-company {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 4px;
}

.tl-meta {
    display: flex;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-bottom: 10px;
}

.tl-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.tl-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 12px;
}

.tl-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tl-tag {
    padding: 3px 10px;
    background: var(--accent-dim);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-full);
    font-size: 0.68rem;
    color: var(--accent);
    font-family: var(--font-mono);
}

/* Projects in resume */
.project-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.proj-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: var(--transition);
    text-decoration: none;
    display: block;
}

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

.proj-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
    gap: 10px;
}

.proj-name {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: var(--transition);
}

.proj-card:hover .proj-name {
    color: var(--accent);
}

.proj-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.proj-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.proj-tag {
    padding: 2px 8px;
    background: var(--accent2-dim);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: var(--radius-full);
    font-size: 0.65rem;
    color: #a78bfa;
    font-family: var(--font-mono);
}

/* ── Portfolio Section ───────────────────────────────────── */
#portfolio {
    background: var(--bg-base);
}

.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.portfolio-filter-btn {
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
    white-space: nowrap;
}

.portfolio-filter-btn:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.portfolio-filter-btn.filter-active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--contrast-color);
    font-weight: 600;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.portfolio-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: var(--transition);
    position: relative;
    display: block;
    text-decoration: none;
}

.portfolio-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-6px);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

.portfolio-img-wrap {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--bg-surface);
}

.portfolio-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-img-wrap img {
    transform: scale(1.08);
}

.portfolio-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 2.5rem;
    background: linear-gradient(
        135deg,
        var(--bg-surface) 0%,
        var(--bg-card) 100%
    );
}

.portfolio-img-placeholder span {
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(3, 13, 26, 0.95) 0%,
        transparent 100%
    );
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 20px;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--accent);
    color: #000;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
    transform: translateY(10px);
}

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

.portfolio-info {
    padding: 14px 16px;
}

.portfolio-title {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    transition: var(--transition);
}

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

.portfolio-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Category badge inside portfolio card */
.portfolio-card-category {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 600;
    border: 1px solid var(--border-accent);
    background: var(--accent-dim);
    color: var(--accent);
    margin-bottom: 6px;
}

/* ── Articles / Blog Section ─────────────────────────────── */
#articles {
    background: var(--bg-surface);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 26px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.article-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient);
    opacity: 0;
    transition: var(--transition);
}

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

.article-card:hover::after {
    opacity: 0.03;
}

.article-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background: var(--accent-dim);
    border: 1px solid var(--border-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--accent);
    transition: var(--transition);
    flex-shrink: 0;
}

.article-card:hover .article-icon-wrap {
    background: var(--accent);
    color: #000;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.article-tag {
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.68rem;
    font-family: var(--font-mono);
    font-weight: 500;
    width: fit-content;
}

.article-title {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    transition: var(--transition);
}

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

.article-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.article-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-weight: 500;
    margin-top: auto;
}

.article-link i {
    transition: transform 0.3s ease;
}
.article-card:hover .article-link i {
    transform: translate(3px, -3px);
}

/* Tag colors */
.tag-flutter {
    background: rgba(2, 119, 189, 0.15);
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.3);
}
.tag-security {
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
    border: 1px solid rgba(248, 113, 113, 0.3);
}
.tag-go {
    background: rgba(6, 182, 212, 0.12);
    color: #22d3ee;
    border: 1px solid rgba(34, 211, 238, 0.3);
}
.tag-architecture {
    background: rgba(99, 102, 241, 0.12);
    color: #a78bfa;
    border: 1px solid rgba(167, 139, 250, 0.3);
}
.tag-tools {
    background: rgba(52, 211, 153, 0.12);
    color: #34d399;
    border: 1px solid rgba(52, 211, 153, 0.3);
}
.tag-all {
    background: rgba(148, 163, 184, 0.1);
    color: #94a3b8;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

/* ── Contact Section ─────────────────────────────────────── */
#contact {
    background: var(--bg-base);
}

.contact-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.contact-info-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    background: var(--accent-dim);
    border: 1px solid var(--border-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-info-label {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.contact-info-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-availability {
    padding: 20px;
    background: linear-gradient(
        135deg,
        rgba(0, 212, 255, 0.05),
        rgba(99, 102, 241, 0.05)
    );
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
}

.contact-availability h4 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

.avail-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.avail-item::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10b981;
    flex-shrink: 0;
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.form-group {
    position: relative;
    margin-bottom: 20px;
}

.form-input,
.form-textarea {
    width: 100%;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
    resize: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

.form-textarea {
    min-height: 140px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 28px;
    background: var(--gradient);
    color: #fff;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--accent-glow);
}
.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.form-message {
    margin-top: 14px;
    padding: 12px 18px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

/* ── Footer ──────────────────────────────────────────────── */
#footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 40px 60px;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
}

.footer-name {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    max-width: 400px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-social a:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
    transform: translateY(-2px);
}

.footer-copy {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ── Scroll to Top ───────────────────────────────────────── */
#scroll-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 900;
    box-shadow: var(--shadow-glow);
}

#scroll-top.active {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

#scroll-top:hover {
    background: var(--accent);
    color: #000;
    transform: translateY(-3px);
}

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fade-up {
    animation: fadeInUp 0.7s ease forwards;
    opacity: 0;
}

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

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1200px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .resume-grid {
        gap: 32px;
    }
    section {
        padding: var(--section-py) 40px;
    }
    #footer {
        padding: 40px;
    }
}

@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    .profile-img-wrap {
        flex-direction: row;
        align-items: center;
    }
    .profile-img-ring {
        width: 160px;
        height: 160px;
        flex-shrink: 0;
    }
    .resume-grid {
        grid-template-columns: 1fr;
    }
    .project-cards {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-py: 60px;
    }

    #sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    #sidebar.open {
        transform: translateX(0);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-overlay.active {
        display: block;
        opacity: 1;
    }

    #main-content {
        margin-left: 0;
    }

    section {
        padding: var(--section-py) 20px;
    }
    #footer {
        padding: 40px 20px;
    }
    #hero {
        padding: 80px 20px 60px;
        min-height: 100svh;
    }

    .hero-name {
        font-size: clamp(2.2rem, 10vw, 3.2rem);
    }
    .hero-cta {
        flex-direction: column;
        align-items: flex-start;
    }

    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .project-cards {
        grid-template-columns: 1fr;
    }
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .profile-img-wrap {
        flex-direction: column;
    }
    .profile-img-ring {
        width: 180px;
        height: 180px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
    .lang-grid {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .hero-social {
        flex-wrap: wrap;
    }
}

/* ── Utility tweaks ──────────────────────────────────────── */

/* Ensure AOS elements don't cause horizontal scroll during animation */
[data-aos] {
    backface-visibility: hidden;
}

/* Smoother section transitions on scroll */
section {
    transition: background-color 0.4s ease;
}

/* Section divider accent line */
.section-header::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    background: var(--gradient);
    border-radius: 2px;
    margin-top: 20px;
}

/* Make contact email a styled link */
#contact-email {
    color: var(--text-primary);
    transition: var(--transition);
}
#contact-email:hover {
    color: var(--accent);
}

/* Ensure skill bars don't overflow on small screens */
.skill-bar-fill {
    max-width: 100%;
}

/* Profile image ring: pause animation on reduced motion */
@media (prefers-reduced-motion: reduce) {
    .profile-img-ring::before {
        animation: none;
    }
    .hero-grid {
        animation: none;
    }
    .hero-orb {
        animation: none;
    }
    .scroll-wheel {
        animation: none;
    }
    .status-dot {
        animation: none;
    }
    .skill-bar-fill::after {
        animation: none;
    }
}