:root {
    --bg-dark: #020617;
    --bg-dark-soft: rgba(15, 23, 42, 0.85);
    --bg-card: rgba(30, 41, 59, 0.75);
    --primary: #38bdf8;
    --secondary: #0ea5e9;
    --text-main: #f8fafc;
    --text-soft: #cbd5f5;
    --radius: 14px;
    --blur: blur(14px);
}



* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", "Segoe UI", sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background: radial-gradient(circle at top, #0f172a, #020617 60%);
    color: var(--text-main);
    transition: background 0.4s, color 0.4s;
}

/* ================= HEADER ================= */

header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 40px;
    background: var(--bg-dark-soft);
    backdrop-filter: var(--blur);
    border-bottom: 1px solid rgba(148,163,184,0.1);
}

.logo {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo span {
    color: var(--primary);
}

nav {
    display: flex;
    align-items: center;
}

nav a {
    margin: 0 14px;
    color: var(--text-soft);
    text-decoration: none;
    font-size: 15px;
    position: relative;
}

nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: 0.3s;
}

nav a:hover::after {
    width: 100%;
}

nav button {
    margin-left: 20px;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 18px;
    cursor: pointer;
}

/* ================= HERO ================= */

.hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
}

.hero h1 {
    font-size: clamp(36px, 6vw, 54px);
    font-weight: 800;
}

.hero span {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero h2 {
    margin-top: 10px;
    font-size: 22px;
    font-weight: 500;
    color: var(--text-soft);
}

.hero p {
    margin-top: 14px;
    max-width: 600px;
    line-height: 1.6;
    color: var(--text-soft);
}

.hero button {
    margin-top: 30px;
    padding: 14px 36px;
    border: none;
    border-radius: 40px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: #020617;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.hero button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(56,189,248,0.35);
}

/* ================= SECTIONS ================= */

.section {
    padding: 90px 20px;
    max-width: 1100px;
    margin: auto;
}

.section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
}

/* ================= ABOUT ================= */

#about p {
    max-width: 800px;
    margin: auto;
    line-height: 1.7;
    font-size: 16px;
    color: var(--text-soft);
    text-align: center;
}

/* ================= SKILLS ================= */

.skill {
    margin-bottom: 24px;
}

.skill span {
    font-size: 14px;
    color: var(--text-soft);
}

.bar {
    margin-top: 8px;
    height: 10px;
    background: rgba(148,163,184,0.15);
    border-radius: 10px;
    overflow: hidden;
}

.bar span {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 10px;
    transition: width 1.5s ease;
}

/* ================= PROJECTS ================= */

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    padding: 28px;
    border-radius: var(--radius);
    backdrop-filter: var(--blur);
    border: 1px solid rgba(148,163,184,0.1);
    cursor: pointer;
    transition: transform 0.35s, box-shadow 0.35s;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 60px rgba(56,189,248,0.25);
}

/* ================= EXPERIENCE ================= */

.timeline {
    display: grid;
    gap: 24px;
}

.entry {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
}

/* ================= CONTACT ================= */

form {
    max-width: 480px;
    margin: auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

input, textarea {
    padding: 12px 14px;
    border-radius: 8px;
    border: none;
    background: rgba(15,23,42,0.6);
    color: var(--text-main);
    outline: none;
}

textarea {
    resize: none;
    height: 120px;
}

form button {
    padding: 12px;
    border-radius: 30px;
    border: none;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: #020617;
    font-weight: 600;
    cursor: pointer;
}

/* ================= MODAL ================= */

.modal {
    position: fixed;
    inset: 0;
    display: none;
    background: rgba(2,6,23,0.75);
    backdrop-filter: blur(8px);
}

.modal-content {
    background: #020617;
    max-width: 420px;
    padding: 30px;
    margin: 20vh auto;
    border-radius: var(--radius);
    text-align: center;
}

/* ================= FOOTER ================= */

footer {
    text-align: center;
    padding: 20px;
    background: rgba(2,6,23,0.9);
    color: var(--text-soft);
}

/* ================= LIGHT MODE ================= */

.light {
    background: linear-gradient(135deg, #f8fafc, #e5e7eb);
    color: #020617;
}

.light header {
    background: rgba(226,232,240,0.9);
}

.light nav a {
    color: #020617;
}

.light .project-card,
.light .entry {
    background: rgba(255,255,255,0.8);
}

.light input,
.light textarea {
    background: rgba(255,255,255,0.9);
    color: #020617;
}

/* ================= RESPONSIVE ================= */

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 10px;
    }

    nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        min-height: 80vh;
    }
}