:root {
    --bg: #050816;
    --bg-alt: #0f172a;
    --card-bg: #0b1120;
    --accent: #22c55e;
    --accent-soft: rgba(34, 197, 94, 0.12);
    --text-main: #e5e7eb;
    --text-muted: #9ca3af;
    --border-subtle: #1f2937;
    --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.65);
}

[data-theme="light"] {
    --bg: #f9fafb;
    --bg-alt: #ffffff;
    --card-bg: #ffffff;
    --accent: #16a34a;
    --accent-soft: rgba(22, 163, 74, 0.08);
    --text-main: #0f172a;
    --text-muted: #4b5563;
    --border-subtle: #e5e7eb;
    --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.12);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: radial-gradient(circle at top left, #1d283a 0, var(--bg) 45%);
    color: var(--text-main);
}

/* NAVBAR */

.nav {
    position: sticky;
    top: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 5vw;
    backdrop-filter: blur(14px);
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.75));
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
}

.nav-logo {
    font-weight: 700;
    letter-spacing: 0.16em;
    font-size: 1rem;
    text-transform: uppercase;
}

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

.nav nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
}

.nav nav a {
    color: var(--text-muted);
    text-decoration: none;
    position: relative;
}

.nav nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -0.3rem;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.25s ease;
}

.nav nav a:hover {
    color: var(--text-main);
}

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

#themeToggle {
    border: 1px solid var(--border-subtle);
    background: rgba(15, 23, 42, 0.7);
    color: var(--text-main);
    border-radius: 999px;
    padding: 0.3rem 0.6rem;
    cursor: pointer;
}

/* SECTIONS */

.section {
    padding: 5rem 5vw;
}

.section:nth-of-type(even) {
    background: radial-gradient(circle at top right, #020617 0, var(--bg-alt) 40%);
}

.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-title h2 {
    font-size: 1.9rem;
    margin: 0;
}

.section-title p {
    margin: 0.4rem 0 0;
    color: var(--text-muted);
}

/* HERO */

.hero {
    min-height: 88vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 760px;
    text-align: left;
}

.hero-tag {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: 0.8rem;
}

.hero h1 {
    font-size: clamp(2.4rem, 4vw, 3.1rem);
    margin: 0;
}

.hero h1 span {
    color: var(--accent);
}

.hero-roles {
    margin: 0.25rem 0 1rem;
    font-size: 1rem;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.hero-role {
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.4);
}

.hero-role-active {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

.hero-text {
    max-width: 640px;
    color: var(--text-muted);
    line-height: 1.6;
}

.hero-actions {
    margin: 1.6rem 0 0.8rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    border-radius: 999px;
    padding: 0.75rem 1.6rem;
    font-size: 0.9rem;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn.primary {
    background: var(--accent);
    color: #020617;
    font-weight: 600;
    box-shadow: var(--shadow-soft);
}

.btn.ghost {
    border-color: rgba(148, 163, 184, 0.5);
    color: var(--text-main);
    background: rgba(15, 23, 42, 0.7);
}

.btn.full-width {
    width: 100%;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 0.8rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ABOUT */

.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.5fr);
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.about p {
    color: var(--text-muted);
    line-height: 1.7;
}

.about-cards {
    display: grid;
    gap: 1rem;
}

.about-card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.2rem 1.3rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.about-card h3 {
    margin: 0 0 0.5rem;
}

.about-card ul {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* SKILLS */

.skills-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
}

.skill-block {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.6rem 1.7rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.skill-block h3 {
    margin: 0 0 0.7rem;
}

.skill-block ul {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* PROJECTS */

.projects-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 1.6rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.6rem 1.7rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.project-tag {
    display: inline-block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    background: var(--accent-soft);
    color: var(--accent);
    border-radius: 999px;
    padding: 0.2rem 0.7rem;
    margin-bottom: 0.4rem;
}

.project-card h3 {
    margin: 0 0 0.4rem;
}

.project-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.project-points {
    margin: 0.5rem 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.project-tech {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* TIMELINE */

.timeline {
    max-width: 900px;
    margin: 0 auto;
    border-left: 2px solid rgba(148, 163, 184, 0.5);
    padding-left: 1.7rem;
}

.timeline-item {
    position: relative;
    margin-bottom: 1.8rem;
}

.timeline-dot {
    position: absolute;
    left: -1.05rem;
    top: 0.35rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.25);
}

.timeline-content {
    background: var(--card-bg);
    border-radius: 0.9rem;
    padding: 1rem 1.2rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.timeline-date {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.timeline-content h3 {
    margin: 0.2rem 0 0.1rem;
}

.timeline-content h4 {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ACHIEVEMENTS */

.achievements-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
}

.achievement-card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem 1.6rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.achievement-card h3 {
    margin: 0 0 0.5rem;
}

.achievement-card ul {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* CONTACT */

.contact-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    gap: 2rem;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.2fr);
}

.contact p {
    color: var(--text-muted);
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    font-size: 0.9rem;
}

.contact-list li {
    margin-bottom: 0.4rem;
}

.contact-list a {
    color: var(--accent);
    text-decoration: none;
}

.contact-form {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.form-row {
    margin-bottom: 0.8rem;
}

input,
textarea {
    width: 100%;
    border-radius: 0.6rem;
    border: 1px solid var(--border-subtle);
    padding: 0.7rem 0.9rem;
    background: rgba(15, 23, 42, 0.7);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
}

[data-theme="light"] input,
[data-theme="light"] textarea {
    background: #f9fafb;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

.form-note {
    margin-top: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* FOOTER */

.footer {
    padding: 1.3rem 5vw 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* RESPONSIVE */

@media (max-width: 900px) {
    .nav nav {
        display: none;
    }

    .hero {
        padding-top: 5rem;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 3.5rem 1.5rem;
    }

    .hero-content {
        text-align: left;
    }
}