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

:root {
    --bg: #0a0a0a;
    --bg-alt: #111111;
    --card-bg: #141414;
    --card-hover: #191919;
    --orange: #ff6600;
    --orange-hover: #ff7a1a;
    --orange-dim: rgba(255, 102, 0, 0.1);
    --text: #f2f2f2;
    --text-muted: #888;
    --text-dim: #555;
    --border: #1e1e1e;
    --radius: 12px;
    --nav-h: 68px;
    --transition: 0.25s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 0.925rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--orange);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--orange-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 102, 0, 0.35);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--orange);
    color: var(--orange);
    transform: translateY(-2px);
}

/* ===== NAVBAR ===== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-h);
    transition: background var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--orange);
    transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: calc(var(--nav-h) + 40px) 24px 80px;
    text-align: center;
}

.hero-glow {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 700px;
    height: 500px;
    background: radial-gradient(ellipse at center, rgba(255, 102, 0, 0.07) 0%, transparent 65%);
    pointer-events: none;
}

.hero-content {
    max-width: 760px;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-size: 1rem;
    font-weight: 500;
    color: var(--orange);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 12px;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.1s forwards;
}

.hero-name {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.2s forwards;
}

.hero-role {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 16px;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.3s forwards;
}

.hero-sub {
    font-size: 1rem;
    color: var(--text-dim);
    max-width: 480px;
    margin: 0 auto 36px;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.4s forwards;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.5s forwards;
}

.scroll-indicator {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 40px;
    border: 2px solid var(--border);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
    opacity: 0;
    animation: fadeIn 1s ease 1s forwards;
}

.scroll-dot {
    width: 4px;
    height: 8px;
    background: var(--orange);
    border-radius: 2px;
    animation: scrollBounce 1.8s ease infinite;
}

/* ===== SECTIONS ===== */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--bg-alt);
}

.section-head {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--orange);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

/* ===== ABOUT ===== */
.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-bio p {
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.75;
}

.about-cta {
    margin-top: 1.5rem;
}

.about-skills h3 {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 16px;
}

.skill-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill {
    padding: 6px 14px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all var(--transition);
}

.skill:hover {
    border-color: var(--orange);
    color: var(--orange);
}

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

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--orange);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.card:hover {
    background: var(--card-hover);
    border-color: rgba(255, 102, 0, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-icon {
    width: 42px;
    height: 42px;
    background: var(--orange-dim);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--orange);
}

.card-gh {
    color: var(--text-dim);
    transition: color var(--transition);
}

.card-gh:hover {
    color: var(--text);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.65;
    flex: 1;
    margin-bottom: 20px;
}

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

.tag {
    padding: 4px 10px;
    background: rgba(255, 102, 0, 0.08);
    border: 1px solid rgba(255, 102, 0, 0.2);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--orange);
    letter-spacing: 0.02em;
}

/* ===== EXPERIENCE CARDS ===== */
.exp-section-head {
    margin-top: 80px;
}

.exp-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.exp-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.exp-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--orange);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.exp-card:hover {
    background: var(--card-hover);
    border-color: rgba(255, 102, 0, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.exp-card:hover::before {
    transform: scaleX(1);
}

.exp-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.exp-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
}

.exp-card-body {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== CONTACT ===== */
.contact-intro {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 480px;
    margin: 0 auto 48px;
}

.contact-cards {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 32px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
    min-width: 260px;
}

.contact-card:hover {
    border-color: var(--orange);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 102, 0, 0.12);
}

.contact-card-icon {
    width: 46px;
    height: 46px;
    background: var(--orange-dim);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--orange);
    flex-shrink: 0;
}

.contact-card-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 4px;
}

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

/* ===== FOOTER ===== */
footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    text-align: center;
}

footer p {
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 0.6; }
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(10px); opacity: 0.4; }
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.97);
        backdrop-filter: blur(12px);
        flex-direction: column;
        gap: 0;
        padding: 16px 0 24px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links li a {
        display: block;
        padding: 14px 24px;
        font-size: 1rem;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

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

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

    .section {
        padding: 70px 0;
    }

    .contact-card {
        min-width: 100%;
    }
}