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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b8;
    --accent: #e94560;
    --accent-dim: #c73650;
    --border: #2a2a4a;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #ff6b81;
}

/* === Navigation === */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
}

.navbar .container {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.navbar .logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.navbar nav {
    display: flex;
    gap: 1.5rem;
}

.navbar nav a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.25rem 0;
    position: relative;
    transition: color 0.2s;
}

.navbar nav a::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.navbar nav a:hover,
.navbar nav a.active {
    color: var(--text-primary);
}

.navbar nav a:hover::after,
.navbar nav a.active::after {
    width: 100%;
}

/* === Main Content === */
.main {
    flex: 1;
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* === Avatar === */
.avatar {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border);
    margin-bottom: 1.5rem;
    transition: border-color 0.3s;
}

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

/* === Hero (index) === */
.hero {
    text-align: center;
    padding: 5rem 0 3rem;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.hero .title {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.hero .location {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero .tagline {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

.contact-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.4rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: var(--font-stack);
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
    border: none;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-accent:hover {
    background: var(--accent-dim);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

#email-placeholder {
    min-width: 180px;
    text-align: center;
}

#email-placeholder a {
    color: #fff;
}

/* === Section Headers === */
.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

/* === Timeline (resume) === */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -2rem;
    top: 0.55rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg-primary);
    transform: translateX(-4px);
}

.timeline-item h3 {
    font-size: 1.15rem;
    margin-bottom: 0.15rem;
}

.timeline-item .period {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 0.15rem;
}

.timeline-item .role {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-item ul {
    list-style: none;
    padding: 0;
}

.timeline-item ul li {
    position: relative;
    padding-left: 1rem;
    margin-bottom: 0.3rem;
    font-size: 0.93rem;
    color: var(--text-secondary);
}

.timeline-item ul li::before {
    content: "\2014";
    position: absolute;
    left: 0;
    color: var(--border);
}

.stack-line {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stack-line strong {
    color: var(--text-primary);
}

/* === Education === */
.education-block {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.education-block h3 {
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.education-block p {
    color: var(--text-secondary);
    font-size: 0.93rem;
}

/* === Tags / Skills === */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.tag {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: border-color 0.2s, color 0.2s;
}

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

/* === Languages === */
.languages {
    display: flex;
    gap: 2rem;
    font-size: 0.95rem;
}

.languages span {
    color: var(--text-secondary);
}

.languages strong {
    color: var(--text-primary);
}

/* === Project Cards === */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.8rem;
    transition: border-color 0.3s, transform 0.2s;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.project-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.4rem;
}

.project-card .desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-card .links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

/* === Book Card with Background === */
.card-book {
    background: url('book-bg.jpg') center/cover no-repeat;
    position: relative;
    overflow: hidden;
    padding: 0;
}

.card-book-content {
    background: rgba(15, 15, 26, 0.82);
    backdrop-filter: blur(2px);
    padding: 1.8rem;
    min-height: 100%;
}

.card-book:hover .card-book-content {
    background: rgba(15, 15, 26, 0.72);
}

.badge {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    vertical-align: middle;
    margin-left: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-soon {
    background: var(--border);
    color: var(--text-secondary);
}

/* === Footer === */
.footer {
    text-align: center;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* === Responsive === */
@media (max-width: 600px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero .title {
        font-size: 1.1rem;
    }

    .main {
        padding: 2rem 1.2rem;
    }

    .navbar .container {
        flex-direction: column;
        height: auto;
        padding: 0.8rem 0;
        gap: 0.5rem;
    }

    .navbar nav {
        gap: 1rem;
    }

    .contact-row {
        flex-direction: column;
        align-items: center;
    }

    .timeline {
        padding-left: 1.5rem;
    }
}