/* Core design tokens for colors, spacing, and shared styling values. */
:root {
    --bg: #0b1220;
    --bg-soft: #111a2b;
    --panel: rgba(17, 26, 43, 0.88);
    --panel-strong: #16233a;
    --border: rgba(160, 185, 218, 0.18);
    --text: #f4f7fb;
    --muted: #adc0df;
    --accent: #6ee7c8;
    --accent-strong: #34d6ae;
    --shadow: 0 20px 45px rgba(0, 0, 0, 0.28);
    --max-width: 1120px;
    --radius: 24px;
}

/* Base reset and typography rules used across the whole page. */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Source Sans 3", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(52, 214, 174, 0.14), transparent 30%),
        radial-gradient(circle at 85% 15%, rgba(110, 231, 200, 0.08), transparent 25%),
        linear-gradient(180deg, #09101b 0%, #0b1220 45%, #0f1728 100%);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

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

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

h1,
h2,
h3 {
    margin: 0;
    font-family: "Outfit", "Trebuchet MS", sans-serif;
    line-height: 1.1;
}

p {
    margin: 0;
}

.container {
    width: min(calc(100% - 2rem), var(--max-width));
    margin: 0 auto;
}

.section {
    padding: 6rem 0;
}

.section-alt {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
}

/* Header and navigation styling for desktop and mobile layouts. */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(18px);
    background: rgba(6, 10, 18, 0.74);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 4.75rem;
    gap: 1rem;
}

.brand {
    font-family: "Outfit", "Trebuchet MS", sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--muted);
    font-weight: 600;
    transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--text);
}

.nav-toggle {
    display: none;
    width: 3rem;
    height: 3rem;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    margin: 0.18rem 0;
    background: var(--text);
    border-radius: 999px;
}

/* Hero and shared content card styling for the main sections. */
.hero {
    padding-top: 7.5rem;
    min-height: calc(100vh - 4.75rem);
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.8fr);
    gap: 2rem;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    font-size: clamp(2.8rem, 5vw, 4.9rem);
    max-width: 10ch;
}

.hero-text {
    max-width: 60ch;
    margin-top: 1.5rem;
    color: var(--muted);
    font-size: 1.15rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.25rem;
    padding: 0 1.4rem;
    border-radius: 999px;
    font-weight: 700;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        background-color 0.2s ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-2px);
}

.button-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #062018;
    box-shadow: 0 14px 24px rgba(52, 214, 174, 0.22);
}

.button-secondary {
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
}

.hero-card,
.content-card,
.skill-card,
.project-card,
.contact-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--panel);
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 2rem;
}

.profile-badge {
    display: inline-flex;
    margin-bottom: 1rem;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    background: rgba(110, 231, 200, 0.1);
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 700;
}

.hero-card h2 {
    margin-bottom: 1rem;
    font-size: 1.65rem;
}

.highlight-list {
    display: grid;
    gap: 1rem;
}

.highlight-list li {
    position: relative;
    padding-left: 1.35rem;
    color: var(--muted);
}

.highlight-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.62rem;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--accent);
}

.section-heading {
    margin-bottom: 2rem;
}

.section-heading h2 {
    max-width: 16ch;
    font-size: clamp(2rem, 3vw, 3rem);
}

.section-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 2rem;
    align-items: start;
}

.content-card {
    padding: 2rem;
    display: grid;
    gap: 1.2rem;
    color: var(--muted);
}

/* Grid-based section layouts for skills and project cards. */
.skills-grid,
.projects-grid {
    display: grid;
    gap: 1.35rem;
}

.skills-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.projects-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skill-card,
.project-card {
    padding: 1.6rem;
    transition:
        transform 0.25s ease,
        border-color 0.25s ease;
}

.skill-card:hover,
.project-card:hover {
    transform: translateY(-4px);
    border-color: rgba(110, 231, 200, 0.35);
}

.skill-card h3,
.project-card h3 {
    margin-bottom: 0.65rem;
    font-size: 1.35rem;
}

.skill-card p,
.project-card p,
.contact-panel p {
    color: var(--muted);
}

.project-tag {
    display: inline-flex;
    margin-bottom: 0.9rem;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    background: rgba(110, 231, 200, 0.08);
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.contact-panel {
    padding: 3rem;
    text-align: center;
}

.contact-panel h2 {
    margin-bottom: 1rem;
    font-size: clamp(2rem, 3vw, 3rem);
}

.contact-link {
    display: inline-flex;
    margin-top: 1.5rem;
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 700;
}

.site-footer {
    padding: 1.5rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.footer-content a:hover,
.footer-content a:focus-visible {
    color: var(--text);
}

/* Small scroll-in animation for sections as they enter the viewport. */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
}

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

/* Tablet layout adjustments. */
@media (max-width: 960px) {
    .hero-grid,
    .section-layout,
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero-grid,
    .section-layout {
        grid-template-columns: 1fr;
    }

    .section-heading h2,
    .hero h1 {
        max-width: none;
    }
}

/* Mobile navigation and single-column stacking rules. */
@media (max-width: 720px) {
    .section {
        padding: 4.75rem 0;
    }

    .nav-toggle {
        display: inline-flex;
        flex-direction: column;
        justify-content: center;
    }

    .navbar {
        position: relative;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 0.75rem);
        right: 0;
        width: min(18rem, calc(100vw - 2rem));
        padding: 1rem;
        border: 1px solid var(--border);
        border-radius: 1.25rem;
        background: rgba(9, 16, 27, 0.96);
        box-shadow: var(--shadow);
        display: none;
        flex-direction: column;
        align-items: flex-start;
    }

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

    .hero {
        min-height: auto;
        padding-top: 6.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .button {
        width: 100%;
    }

    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-panel {
        padding: 2.25rem 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}