/* ==========================================================================
   ABHISHEK NIGAM PORTFOLIO — ENHANCED CSS
   Key improvements:
   - New font stack: Bricolage Grotesque (display) + DM Sans (body)
   - Scroll progress bar
   - Mobile hamburger menu & overlay
   - Hero dot-grid background + gradient mesh
   - Typed cursor animation
   - Scroll-down indicator
   - Gradient accent top-border on card hover
   - Colored skill tag variants
   - Hero badge component
   - Improved mobile responsiveness (breakpoints at 768px + 480px)
   - Better stat/achievement boxes with counter-ready markup
   - Custom scrollbar
   - Refined section backgrounds with subtle grain
   ========================================================================== */

/* --- 1. Design Tokens & CSS Variables --- */
:root {
    /* Typography */
    --font-display: 'Bricolage Grotesque', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Color Palette */
    --text-main: #18181B;
    --text-muted: #52525B;
    --text-light: #A1A1AA;
    --accent-1: #1D4ED8;
    --accent-2: #5B21B6;
    --accent-teal: #0891B2;
    --accent-amber: #B45309;
    --accent-glow: rgba(29, 78, 216, 0.12);

    /* Surfaces */
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.9);

    /* Shadows */
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.1);
    --shadow-card-hover: 0 24px 52px rgba(29, 78, 216, 0.1);

    /* Motion */
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-fast: all 0.2s ease;

    /* Radii */
    --radius-card: 18px;
    --radius-pill: 50px;
}

/* --- 2. Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    font-family: var(--font-body);
    color: var(--text-main);
    overflow-x: hidden;
    /* ENHANCEMENT: Custom scrollbar */
    scrollbar-width: thin;
    scrollbar-color: rgba(29, 78, 216, 0.3) transparent;
}
html::-webkit-scrollbar { width: 5px; }
html::-webkit-scrollbar-track { background: transparent; }
html::-webkit-scrollbar-thumb { background: rgba(29, 78, 216, 0.3); border-radius: 10px; }

body { overflow-x: hidden; }

/* --- 3. Scroll Progress Bar --- */
/* ENHANCEMENT: Thin gradient line tracking scroll position at the top of the viewport */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    z-index: 9999;
    transition: width 0.1s linear;
    border-radius: 0 2px 2px 0;
}

/* --- 4. Section Backgrounds --- */
#hero         { background-color: #FAFAF9; position: relative; overflow: hidden; }
#about        { background-color: #F4F1EB; border-top: 1px solid rgba(0,0,0,0.04); border-bottom: 1px solid rgba(0,0,0,0.04); }
#skills       { background-color: #FFFFFF; }
#experience   { background-color: #EDF0F4; border-top: 1px solid rgba(0,0,0,0.04); border-bottom: 1px solid rgba(0,0,0,0.04); }
#projects     { background-color: #F8F5F0; }
#certifications { background-color: #FFFFFF; border-top: 1px solid rgba(0,0,0,0.04); }
#contact      { background-color: #E9EAEB; border-top: 1px solid rgba(0,0,0,0.05); }

/* --- 5. Ambient Background Glows --- */
.bg-glow {
    position: fixed;
    width: 700px; height: 700px;
    background: radial-gradient(circle, rgba(29, 78, 216, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    filter: blur(90px);
    animation: float 22s infinite ease-in-out alternate;
    pointer-events: none;
}
.glow-1 { top: -20%; left: -10%; }
.glow-2 { bottom: -20%; right: -10%; background: radial-gradient(circle, rgba(91, 33, 182, 0.05) 0%, transparent 70%); animation-delay: -11s; }
/* ENHANCEMENT: Third subtle glow for midpage depth */
.glow-3 { top: 40%; left: 40%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(8, 145, 178, 0.03) 0%, transparent 70%); animation-delay: -5s; }

@keyframes float {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(80px, 130px) scale(1.15); }
}

/* --- 6. Typography & Gradients --- */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-display);
}
.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-family: var(--font-display);
    font-weight: 800;
    margin-bottom: 4rem;
    letter-spacing: -1.5px;
    color: var(--text-main);
    line-height: 1.1;
}

/* --- 7. Glassmorphism Cards --- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    /* ENHANCEMENT: Prepare for top-border gradient on hover */
    position: relative;
    overflow: hidden;
}
/* ENHANCEMENT: Gradient top-border accent line that appears on hover */
.glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    opacity: 0;
    transition: opacity 0.35s ease;
    border-radius: var(--radius-card) var(--radius-card) 0 0;
}
.glass-card:hover::before { opacity: 1; }

/* --- 8. Navigation --- */
#navbar {
    position: fixed;
    top: 18px;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: center;
    transition: var(--transition);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 82%;
    max-width: 1050px;
    padding: 14px 28px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 4px 24px rgba(0,0,0,0.05);
    transition: var(--transition);
}
.nav-container.scrolled {
    box-shadow: 0 8px 32px rgba(0,0,0,0.09);
    background: rgba(255, 255, 255, 0.95);
}

/* ENHANCEMENT: Display font for logo */
.logo {
    font-size: 1.5rem;
    font-family: var(--font-display);
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    font-style: italic;
    letter-spacing: -1px;
}
.logo .dot { color: var(--accent-1); }

.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
    font-weight: 500;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    transition: var(--transition-fast);
    color: var(--text-muted);
    text-decoration: none;
    padding: 4px 0;
    position: relative;
}
/* ENHANCEMENT: Animated underline on nav links */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0%; height: 2px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    border-radius: 2px;
    transition: width 0.25s ease;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent-1); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* ENHANCEMENT: Hamburger Button */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: var(--transition-fast);
}
.hamburger:hover { background: rgba(0,0,0,0.04); }
.hamburger span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ENHANCEMENT: Mobile full-screen overlay menu */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.mobile-menu.open {
    display: flex;
    opacity: 1;
    pointer-events: all;
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.mobile-menu-close {
    position: absolute;
    top: 28px; right: 28px;
    background: none; border: none;
    font-size: 1.6rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}
.mobile-menu-close:hover { color: var(--accent-1); transform: rotate(90deg); }

.mobile-nav-links { list-style: none; text-align: center; }
.mobile-nav-links li { margin: 14px 0; }
.mobile-nav-link {
    font-family: var(--font-display);
    font-size: clamp(2rem, 8vw, 2.8rem);
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -1px;
    transition: var(--transition-fast);
}
.mobile-nav-link:hover { color: var(--accent-1); }

.mobile-menu-footer {
    position: absolute;
    bottom: 40px;
    display: flex;
    gap: 24px;
}
.mobile-menu-footer a {
    font-size: 1.4rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}
.mobile-menu-footer a:hover { color: var(--accent-1); }

/* --- 9. Layout Defaults --- */
.section {
    padding: 120px 10%;
    max-width: 1400px;
    margin: 0 auto;
}

/* --- 10. Hero Section --- */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

/* ENHANCEMENT: Subtle animated dot grid for hero background depth */
.hero-dot-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(29, 78, 216, 0.07) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.6;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* ENHANCEMENT: Hero availability badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(29, 78, 216, 0.07);
    border: 1px solid rgba(29, 78, 216, 0.15);
    border-radius: var(--radius-pill);
    padding: 8px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-1);
    letter-spacing: 0.5px;
    margin-bottom: 28px;
}
.badge-dot {
    width: 7px; height: 7px;
    background: #22C55E;
    border-radius: 50%;
    display: inline-block;
    animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5); }
    50%       { box-shadow: 0 0 0 5px rgba(34, 197, 94, 0); }
}

.greeting {
    color: var(--text-muted);
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
    font-weight: 400;
}
.name {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    line-height: 1.1;
    padding-bottom: 10px;
    margin-bottom: 8px;
    letter-spacing: -3px;
}

/* ENHANCEMENT: Typed animation wrapper */
.title {
    font-size: clamp(1.2rem, 3vw, 1.9rem);
    color: var(--text-main);
    font-weight: 600;
    margin-bottom: 28px;
    font-family: var(--font-body);
    min-height: 2.4em;
}
.typed-static { color: var(--text-muted); }
.typed-word { color: var(--accent-1); font-weight: 700; }
.typed-cursor {
    color: var(--accent-1);
    animation: blink 0.9s step-end infinite;
    font-weight: 300;
    margin-left: 2px;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.intro {
    max-width: 680px;
    margin: 0 auto 40px;
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--text-muted);
    line-height: 1.85;
    font-weight: 400;
}

/* ENHANCEMENT: Scroll-down indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 56px;
    opacity: 0.5;
    animation: fadeInUp 1.5s 1s ease forwards;
    opacity: 0;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 0.5; transform: translateY(0); }
}
.scroll-mouse {
    width: 24px; height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}
.scroll-wheel {
    width: 4px; height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scroll-bounce 1.8s infinite;
}
@keyframes scroll-bounce {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50%       { transform: translateY(8px); opacity: 0.3; }
}
.scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

/* --- 11. Buttons --- */
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
    padding: 14px 32px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 0.95rem;
    font-family: var(--font-body);
}
.primary-btn {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    box-shadow: 0 10px 24px -8px rgba(29, 78, 216, 0.5);
    border: none;
    position: relative;
    overflow: hidden;
}
/* ENHANCEMENT: Shimmer/shine sweep on primary button hover */
.primary-btn::after {
    content: '';
    position: absolute;
    top: -50%; left: -70%;
    width: 60%; height: 200%;
    background: rgba(255,255,255,0.15);
    transform: skewX(-20deg);
    transition: left 0.5s ease;
    pointer-events: none;
}
.primary-btn:hover { transform: translateY(-3px); box-shadow: 0 16px 32px -8px rgba(91, 33, 182, 0.5); }
.primary-btn:hover::after { left: 130%; }

.secondary-btn {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.1);
    color: var(--text-main);
}
.secondary-btn:hover { border-color: var(--accent-1); color: var(--accent-1); box-shadow: var(--shadow-soft); transform: translateY(-2px); }

/* --- 12. About & Achievements --- */
.about-container { max-width: 900px; margin: 0 auto; }
.about-text { padding: 45px 50px; font-size: 1.1rem; color: var(--text-muted); line-height: 1.85; }
.about-text p + p { margin-top: 18px; }
.achievements { display: flex; gap: 0; margin-top: 44px; border-top: 1px solid rgba(0,0,0,0.06); }
.stat-box {
    flex: 1;
    padding: 28px 20px;
    text-align: center;
    position: relative;
}
.stat-box + .stat-box::before {
    content: '';
    position: absolute;
    left: 0; top: 20%; bottom: 20%;
    width: 1px;
    background: rgba(0,0,0,0.07);
}
/* ENHANCEMENT: Larger, more impactful stat numbers */
.stat-box h4 {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    margin-bottom: 6px;
    font-weight: 800;
    letter-spacing: -2px;
}
.stat-box p {
    font-size: 0.85rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* --- 13. Skills Grid --- */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }

.skill-category { padding: 36px; transition: var(--transition); }
.skill-category:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); }

/* ENHANCEMENT: Skill icon background circle */
.skill-icon-wrap {
    width: 52px; height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(29, 78, 216, 0.08), rgba(91, 33, 182, 0.06));
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    color: var(--accent-1);
    margin-bottom: 20px;
    border: 1px solid rgba(29, 78, 216, 0.1);
}

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 18px;
    color: var(--text-main);
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.5px;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-tags span {
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.2px;
}

/* ENHANCEMENT: Colored skill tag variants per category */
.tag-blue   { background: rgba(29, 78, 216, 0.07); border: 1px solid rgba(29, 78, 216, 0.18); color: var(--accent-1); }
.tag-violet { background: rgba(91, 33, 182, 0.07); border: 1px solid rgba(91, 33, 182, 0.18); color: var(--accent-2); }
.tag-teal   { background: rgba(8, 145, 178, 0.07); border: 1px solid rgba(8, 145, 178, 0.18); color: var(--accent-teal); }
.tag-amber  { background: rgba(180, 83, 9, 0.07);  border: 1px solid rgba(180, 83, 9, 0.18);  color: var(--accent-amber); }

/* --- 14. Experience Timeline --- */
.timeline { position: relative; max-width: 1020px; margin: 0 auto; padding: 20px 0; }
.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: linear-gradient(to bottom, transparent 0%, rgba(29, 78, 216, 0.15) 15%, rgba(29, 78, 216, 0.15) 85%, transparent 100%);
    top: 0; bottom: 0;
    left: 50%;
    margin-left: -1px;
}
.timeline-item { padding: 10px 44px; position: relative; width: 50%; }
.timeline-item.left  { left: 0; }
.timeline-item.right { left: 50%; }

.timeline-dot {
    position: absolute;
    width: 18px; height: 18px;
    right: -9px;
    background-color: #EDF0F4;
    border: 3px solid var(--accent-1);
    top: 42px;
    border-radius: 50%;
    z-index: 1;
    transition: var(--transition);
}
.timeline-item.right .timeline-dot { left: -9px; }
.timeline-item:hover .timeline-dot { background-color: var(--accent-1); box-shadow: 0 0 18px rgba(29, 78, 216, 0.4); }

.timeline-content {
    padding: 32px;
    border-radius: var(--radius-card);
    transition: var(--transition);
}
.timeline-item:hover .timeline-content { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }

.timeline-date {
    display: inline-block;
    color: var(--accent-1);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    margin-bottom: 14px;
    background: rgba(29, 78, 216, 0.07);
    padding: 5px 14px;
    border-radius: 20px;
}
.timeline-title {
    font-size: 1.3rem;
    margin-bottom: 7px;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-main);
}
.timeline-company { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 22px; font-weight: 500; }
.timeline-company i { margin-right: 8px; color: var(--accent-2); }
.timeline-bullets { list-style: none; padding: 0; }
.timeline-bullets li {
    color: var(--text-muted);
    margin-bottom: 10px;
    font-size: 0.92rem;
    position: relative;
    padding-left: 22px;
    line-height: 1.65;
}
.timeline-bullets li::before {
    content: '▹';
    position: absolute; left: 0;
    color: var(--accent-1);
    font-size: 1.1rem;
    line-height: 1.3;
    top: 0;
}

/* --- 15. Projects Portfolio --- */
.view-toggle-container { display: flex; justify-content: center; margin-bottom: 28px; }
.view-toggle {
    background: rgba(0,0,0,0.05);
    padding: 5px;
    border-radius: var(--radius-pill);
    display: inline-flex;
    border: 1px solid rgba(0,0,0,0.06);
}
.toggle-btn {
    background: transparent; border: none;
    padding: 10px 26px;
    border-radius: var(--radius-pill);
    font-weight: 600; font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
}
.toggle-btn.active {
    background: #fff; color: var(--accent-1);
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
}

.filter-controls { display: flex; justify-content: center; gap: 10px; margin-bottom: 50px; flex-wrap: wrap; }
.filter-btn {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.09);
    color: var(--text-muted);
    padding: 9px 20px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-body);
}
.filter-btn:hover, .filter-btn.active {
    background: var(--text-main); color: #fff; border-color: var(--text-main);
    transform: translateY(-1px);
}

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 32px; }
.project-card {
    padding: 36px;
    display: flex; flex-direction: column;
    transition: var(--transition);
    cursor: pointer;
}
.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.project-category {
    color: var(--accent-1);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 14px;
    font-weight: 700;
}
.project-title {
    font-size: 1.35rem;
    margin-bottom: 14px;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.3;
    color: var(--text-main);
}
.project-desc {
    color: var(--text-muted);
    margin-bottom: 28px;
    flex-grow: 1;
    line-height: 1.65;
    font-size: 0.94rem;
}
.read-more-btn {
    color: var(--text-main);
    display: inline-flex; align-items: center; gap: 10px;
    font-weight: 700; font-size: 0.875rem;
    transition: var(--transition);
}
.project-card:hover .read-more-btn { color: var(--accent-1); gap: 14px; }

/* --- 16. Certifications --- */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    max-width: 1100px;
    margin: 0 auto;
}
.cert-card {
    display: flex; align-items: center;
    padding: 28px; gap: 22px;
    transition: var(--transition);
}
.cert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card-hover); }
.cert-icon {
    font-size: 2rem;
    color: var(--accent-1);
    background: rgba(29, 78, 216, 0.06);
    width: 66px; height: 66px;
    display: flex; justify-content: center; align-items: center;
    border-radius: 50%;
    border: 1px solid rgba(29, 78, 216, 0.12);
    flex-shrink: 0;
    transition: var(--transition);
}
.cert-card:hover .cert-icon {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 8px 24px rgba(29, 78, 216, 0.3);
}
.cert-details h3 {
    font-size: 1.15rem;
    color: var(--text-main);
    margin-bottom: 4px;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.3px;
}
.cert-details p { color: var(--text-muted); font-size: 0.88rem; margin: 0; line-height: 1.4; }

/* ENHANCEMENT: Small "Certified" badge on cert cards */
.cert-badge {
    display: inline-block;
    margin-top: 10px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #16A34A;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
}

/* --- 17. Modal --- */
.modal {
    display: none; position: fixed;
    z-index: 2000; left: 0; top: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.modal-content {
    background: #fff;
    margin: 4% auto; padding: 52px;
    width: 90%; max-width: 820px;
    animation: slideUp 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    border-radius: var(--radius-card);
    box-shadow: 0 32px 64px rgba(0,0,0,0.18);
    max-height: 88vh;
    overflow-y: auto;
    scrollbar-width: thin;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.close-modal {
    position: absolute; top: 22px; right: 30px;
    font-size: 2rem; cursor: pointer;
    color: var(--text-light); transition: var(--transition);
    line-height: 1; width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
}
.close-modal:hover { color: var(--accent-1); background: rgba(29,78,216,0.06); transform: rotate(90deg); }

/* --- 18. Contact --- */
.contact-container { text-align: center; max-width: 820px; margin: 0 auto; padding: 60px 50px; }
.contact-links { display: flex; justify-content: center; gap: 32px; margin-top: 44px; flex-wrap: wrap; }
.contact-item {
    display: flex; flex-direction: column; align-items: center; gap: 14px;
    color: var(--text-muted); transition: var(--transition); text-decoration: none;
    font-weight: 500; font-size: 0.9rem;
}
.icon-wrap {
    width: 62px; height: 62px;
    border-radius: 50%;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.07);
    display: flex; justify-content: center; align-items: center;
    font-size: 1.4rem;
    transition: var(--transition);
    box-shadow: var(--shadow-soft);
}
.contact-item:hover { color: var(--text-main); }
.contact-item:hover .icon-wrap {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff; border-color: transparent;
    transform: translateY(-5px);
    box-shadow: 0 16px 32px rgba(29, 78, 216, 0.3);
}

/* --- 19. Footer --- */
footer {
    background-color: #E9EAEB;
    border-top: 1px solid rgba(0,0,0,0.05);
    padding: 36px 10%;
}
/* ENHANCEMENT: Three-column footer layout */
.footer-inner {
    max-width: 1050px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 16px;
}
.footer-logo {
    font-family: var(--font-display);
    font-size: 1.3rem; font-weight: 800;
    font-style: italic; letter-spacing: -1px;
    color: var(--text-main);
}
footer p { color: var(--text-muted); font-size: 0.875rem; }
.footer-links { display: flex; gap: 18px; }
.footer-links a {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: var(--transition-fast);
    text-decoration: none;
}
.footer-links a:hover { color: var(--accent-1); transform: translateY(-2px); display: inline-block; }

/* --- 20. Reveal Scroll Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.8, 0.25, 1),
                transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.reveal.active { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.14s; }
.delay-2 { transition-delay: 0.28s; }
.delay-3 { transition-delay: 0.42s; }

/* --- 21. Responsive — Tablet & Mobile --- */
@media (max-width: 1024px) {
    .section { padding: 100px 8%; }
    .timeline-item { padding: 10px 32px; }
}

@media (max-width: 768px) {
    .section { padding: 80px 6%; }

    /* Nav: hide links, show hamburger */
    .nav-container { width: 92%; padding: 14px 20px; }
    .nav-links { display: none; }
    .hamburger { display: flex; }

    /* Hero */
    .name { font-size: 3.2rem; letter-spacing: -2px; }
    .title { font-size: 1.1rem; }
    .cta-buttons { flex-direction: column; align-items: center; }
    .cta-buttons .btn { width: 100%; max-width: 280px; justify-content: center; }
    .scroll-indicator { display: none; }

    /* About */
    .about-text { padding: 28px; }
    .achievements { flex-direction: column; }
    .stat-box + .stat-box::before { display: none; }
    .stat-box { border-top: 1px solid rgba(0,0,0,0.06); padding: 20px; }

    /* Timeline */
    .timeline::after { left: 20px; }
    .timeline-item { width: 100%; padding-left: 52px; padding-right: 0; }
    .timeline-item.left, .timeline-item.right { left: 0; }
    .timeline-item.left .timeline-dot,
    .timeline-item.right .timeline-dot { left: 11px; right: auto; }
    .timeline-content { padding: 24px; }

    /* Contact */
    .contact-container { padding: 36px 24px; }
    .contact-links { flex-direction: column; align-items: center; gap: 20px; }

    /* Modal */
    .modal-content { padding: 28px 24px; margin: 6% auto; }

    /* Footer */
    .footer-inner { flex-direction: column; text-align: center; gap: 10px; }
}

@media (max-width: 480px) {
    .name { font-size: 2.5rem; }
    .section-title { font-size: 1.9rem; letter-spacing: -1px; }
    .projects-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr; }
}