/* ============================================================
   style.css — Portfolio: Shashank Sangepu
   ============================================================ */

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

:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --accent: #10b981;
    --accent-hover: #34d399;
    --font: "Inter", sans-serif;
    --mono: "JetBrains Mono", monospace;
    --radius: 12px;
    --max-w: 1100px;
    --nav-h: 64px;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}
ul {
    list-style: none;
}

/* ── Utility ───────────────────────────────────────────────── */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 5rem 0;
}

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

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    display: inline-block;
    position: relative;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.4rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* ── Navigation ────────────────────────────────────────────── */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-links a {
    color: var(--muted);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    transition:
        color 0.2s,
        background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
    background: var(--accent) !important;
    color: #fff !important;
}
.nav-cta:hover {
    background: var(--accent-hover) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s;
}

/* ── Hero ──────────────────────────────────────────────────── */
#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(var(--nav-h) + 2rem) 2rem 4rem;
    max-width: var(--max-w);
    margin: 0 auto;
    position: relative;
}

.hero-greeting {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 1rem;
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.hero-title {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 400;
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.hero-bio {
    max-width: 560px;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero-scroll {
    position: absolute;
    bottom: 2.5rem;
    left: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--muted);
    font-size: 0.75rem;
    font-family: var(--mono);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-line {
    width: 40px;
    height: 1px;
    background: var(--border);
}

/* ── About ─────────────────────────────────────────────────── */
#about {
    background: rgba(30, 41, 59, 0.3);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--muted);
    margin-bottom: 1.25rem;
    font-size: 1.025rem;
    line-height: 1.75;
}

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

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    min-width: 240px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--mono);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Skills ────────────────────────────────────────────────── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.skill-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: border-color 0.2s;
}

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

.skill-card h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(16, 185, 129, 0.08);
    color: var(--muted);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 6px;
    padding: 0.3rem 0.7rem;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s;
}

.tag:hover {
    background: rgba(16, 185, 129, 0.15);
    color: var(--text);
}

/* ── Projects ──────────────────────────────────────────────── */
#projects {
    background: rgba(30, 41, 59, 0.3);
}

.projects-grid {
    display: grid;
    gap: 1.5rem;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition:
        border-color 0.2s,
        transform 0.2s;
}

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

.project-card.featured {
    border-color: rgba(16, 185, 129, 0.3);
}

.project-badge {
    display: inline-block;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.project-description {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.25rem 0.65rem;
    font-size: 0.78rem;
    font-family: var(--mono);
}

.project-links {
    display: flex;
    gap: 0.75rem;
}

/* ── Experience ────────────────────────────────────────────── */
.timeline {
    position: relative;
    padding-left: 1.5rem;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 2rem;
    padding-bottom: 2.5rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -1.5rem;
    top: 6px;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border: 2px solid var(--bg);
    border-radius: 50%;
    transform: translateX(-5px);
}

.timeline-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: border-color 0.2s;
}

.timeline-content:hover {
    border-color: rgba(16, 185, 129, 0.4);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.timeline-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
}

.company {
    display: block;
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.2rem;
}

.timeline-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
}

.period {
    font-size: 0.8rem;
    color: var(--muted);
    font-family: var(--mono);
    white-space: nowrap;
}

.location {
    font-size: 0.75rem;
    color: var(--muted);
}

.timeline-bullets {
    list-style: disc;
    padding-left: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.timeline-bullets li {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ── Education ─────────────────────────────────────────────── */
#education {
    background: rgba(30, 41, 59, 0.3);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.edu-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    transition: border-color 0.2s;
}

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

.edu-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.edu-details h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    line-height: 1.4;
}

.edu-school {
    display: block;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.edu-gpa {
    display: block;
    font-size: 0.8rem;
    color: var(--muted);
    font-family: var(--mono);
}

/* ── Contact ───────────────────────────────────────────────── */
#contact {
    text-align: center;
}

.contact-sub {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 480px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

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

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 2rem;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    transition: all 0.2s;
}

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

/* ── Footer ────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 2rem;
    color: var(--muted);
    font-size: 0.85rem;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 1rem;
        gap: 0.25rem;
    }

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

    .nav-links a {
        padding: 0.6rem 1rem;
        width: 100%;
        text-align: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        min-width: unset;
        width: 100%;
    }

    .timeline-header {
        flex-direction: column;
    }

    .timeline-meta {
        align-items: flex-start;
    }

    .hero-scroll {
        display: none;
    }
}