/* Design Tokens */
:root {
    --color-bg: #0a0a0a;
    --color-surface: #111217;
    --color-surface-2: #171a21;
    --color-border: #2a2f3a;
    --color-text: #f5f7fb;
    --color-muted: #9aa3b2;
    --color-accent: #1ee3a2;
    --color-accent-2: #4aa8ff;
    --color-danger: #ef4444;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-7: 2rem;
    --space-8: 2.5rem;
    --space-9: 3rem;
    --space-10: 4rem;

    --shadow-sm: 0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 18px 40px rgba(0, 0, 0, 0.45);

    --font-title: clamp(2.4rem, 5vw, 4.5rem);
    --font-h2: clamp(1.6rem, 2.5vw, 2.6rem);
    --font-h3: clamp(1.1rem, 1.8vw, 1.4rem);
    --font-body: 1rem;

    --duration-fast: 160ms;
    --duration-base: 240ms;
    --duration-slow: 420ms;

    --vh: 1vh;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    scroll-behavior: smooth;
    overflow-x: hidden;
    height: auto;
}

body {
    font-family: "Sora", "Segoe UI", sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 32px 32px;
    background-position: center;
}

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

.skip-link {
    position: absolute;
    left: 1rem;
    top: -200px;
    background: var(--color-accent);
    color: #05110b;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    z-index: 2000;
    transition: transform var(--duration-base) ease;
}

.skip-link:focus-visible {
    transform: translateY(220px);
}

:focus-visible {
    outline: 2px solid var(--color-accent-2);
    outline-offset: 3px;
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    z-index: 1200;
}

.scroll-progress__bar {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
    transition: width var(--duration-fast) ease;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 var(--space-7);
    width: 100%;
}

.section {
    padding: var(--space-10) 0;
    content-visibility: auto;
    contain-intrinsic-size: 600px;
}

.section__header {
    max-width: 720px;
    margin-bottom: var(--space-8);
}

.section__title {
    font-size: var(--font-h2);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.section__lead {
    color: var(--color-muted);
    font-size: 1.05rem;
}

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--duration-slow) ease, transform var(--duration-slow) ease;
    will-change: opacity, transform;
}

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

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.nav {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) 0;
}

.logo {
    font-weight: 800;
    letter-spacing: 0.2em;
    font-size: 1rem;
}

.nav__links {
    list-style: none;
    display: flex;
    gap: var(--space-6);
}

.nav__links a {
    text-decoration: none;
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color var(--duration-fast) ease;
}

.nav__links a.active,
.nav__links a:hover {
    color: var(--color-text);
}

.nav__toggle {
    display: none;
    width: 32px;
    height: 28px;
    border: none;
    background: none;
    cursor: pointer;
    gap: 6px;
    flex-direction: column;
    justify-content: center;
}

.nav__toggle span {
    height: 2px;
    width: 100%;
    background: var(--color-text);
    border-radius: 999px;
    transition: transform var(--duration-fast) ease;
}

.hero {
    padding-top: 7rem;
    position: relative;
    overflow: hidden;
}

.hero__glow {
    position: absolute;
    width: 420px;
    height: 420px;
    right: -140px;
    top: -120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(30, 227, 162, 0.18) 0%, transparent 70%);
    pointer-events: none;
    filter: blur(10px);
}

.hero__content {
    display: grid;
    gap: var(--space-9);
}

.hero__text {
    max-width: 620px;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    color: var(--color-accent-2);
}

.hero__title {
    font-size: var(--font-title);
    font-weight: 800;
    margin: var(--space-4) 0 var(--space-5);
}

.hero__subtitle {
    color: var(--color-muted);
    font-size: 1.05rem;
    margin-bottom: var(--space-6);
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.hero__proof {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.hero__panel {
    display: grid;
    gap: var(--space-5);
}

.hero__panel-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.hero__panel-card--outline {
    background: transparent;
}

.hero__panel-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-muted);
    margin-bottom: var(--space-3);
}

.hero__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.6rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease, background var(--duration-fast) ease;
}

.btn--primary {
    background: var(--color-accent);
    color: #04110b;
    box-shadow: 0 14px 24px rgba(30, 227, 162, 0.25);
}

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

.btn--ghost {
    border-color: var(--color-border);
    color: var(--color-text);
    background: transparent;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.badge--soft {
    background: rgba(74, 168, 255, 0.12);
    color: #c5e2ff;
    border-color: rgba(74, 168, 255, 0.3);
}

.badge--success {
    background: rgba(30, 227, 162, 0.12);
    color: #b7f6dc;
    border-color: rgba(30, 227, 162, 0.3);
}

.tag {
    display: inline-flex;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.grid {
    display: grid;
    gap: var(--space-6);
}

.grid--cards {
    grid-template-columns: 1fr;
}

.grid--caps {
    grid-template-columns: 1fr;
}

.stack {
    display: grid;
    gap: var(--space-6);
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.card__header h3 {
    font-size: var(--font-h3);
}

.card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.details {
    margin-top: var(--space-5);
    color: var(--color-muted);
}

.details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text);
    list-style: none;
}

.details summary::-webkit-details-marker {
    display: none;
}

.details summary::after {
    content: "+";
    float: right;
    color: var(--color-muted);
}

.details[open] summary::after {
    content: "-";
}

.details ul {
    margin-top: var(--space-4);
    display: grid;
    gap: var(--space-3);
    padding-left: var(--space-5);
}

.about p {
    max-width: 680px;
    color: var(--color-muted);
    margin-bottom: var(--space-4);
}

.section--cta {
    background: var(--color-surface-2);
    border-top: 1px solid var(--color-border);
}

.cta {
    display: grid;
    gap: var(--space-8);
}

.cta__content h2 {
    font-size: var(--font-h2);
    margin-bottom: var(--space-4);
}

.cta__content p {
    color: var(--color-muted);
    margin-bottom: var(--space-6);
}

.cta__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.form {
    display: grid;
    gap: var(--space-5);
}

.form__group {
    display: grid;
    gap: var(--space-2);
}

.form__group label {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.form input,
.form textarea {
    background: #0f1116;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

@media (max-width: 768px) {
    .form input,
    .form textarea {
        font-size: 16px;
    }
}

.form input:focus,
.form textarea:focus {
    border-color: var(--color-accent-2);
    box-shadow: 0 0 0 3px rgba(74, 168, 255, 0.2);
    outline: none;
}

.form input[aria-invalid="true"],
.form textarea[aria-invalid="true"] {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form__error {
    color: var(--color-danger);
    font-size: 0.8rem;
    min-height: 1rem;
}

.form__status {
    font-size: 0.85rem;
    color: var(--color-muted);
    min-height: 1rem;
}

.footer {
    padding: var(--space-7) 0;
    border-top: 1px solid var(--color-border);
}

.footer__inner {
    color: var(--color-muted);
    font-size: 0.9rem;
}

@media (min-width: 768px) {
    .hero__content {
        grid-template-columns: 1.2fr 0.8fr;
        align-items: center;
    }

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

    .grid--caps {
        grid-template-columns: repeat(2, 1fr);
    }

    .cta {
        grid-template-columns: 1.1fr 0.9fr;
        align-items: start;
    }
}

@media (max-width: 820px) {
    .nav__toggle {
        display: flex;
    }

    .nav__links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: var(--space-5) var(--space-7);
        gap: var(--space-4);
        background: rgba(10, 10, 10, 0.95);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--duration-base) ease;
    }

    .nav__links.is-open {
        max-height: 320px;
    }
}

@media (max-width: 640px) {
    :root {
        --font-title: clamp(1.8rem, 5vw, 2.8rem);
        --font-h2: clamp(1.3rem, 2.5vw, 1.8rem);
        --font-h3: clamp(0.95rem, 1.8vw, 1.1rem);
    }

    .container {
        padding: 0 var(--space-5);
    }

    .section {
        padding: var(--space-7) 0;
    }

    .hero {
        padding-top: 5rem;
    }

    .hero__glow {
        width: 300px;
        height: 300px;
        right: -100px;
        top: -80px;
        filter: blur(8px);
    }

    .hero__content {
        gap: var(--space-6);
    }

    .hero__text {
        max-width: 100%;
    }

    .eyebrow {
        font-size: 0.7rem;
        letter-spacing: 0.15em;
    }

    .hero__title {
        margin: var(--space-3) 0 var(--space-4);
        letter-spacing: -0.5px;
    }

    .hero__subtitle {
        font-size: 0.95rem;
        margin-bottom: var(--space-5);
    }

    .hero__cta {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-3);
    }

    .hero__proof {
        margin-top: var(--space-5);
        gap: var(--space-2);
    }

    .badge {
        padding: 0.35rem 0.7rem;
        font-size: 0.65rem;
        white-space: nowrap;
    }

    .btn {
        width: 100%;
        padding: 0.75rem 1.2rem;
        min-height: 44px;
        font-size: 0.95rem;
    }

    .btn--primary {
        box-shadow: 0 10px 20px rgba(30, 227, 162, 0.2);
    }

    .hero__panel {
        gap: var(--space-4);
    }

    .hero__panel-card {
        padding: var(--space-5);
        border-radius: var(--radius-md);
    }

    .card {
        padding: var(--space-5);
    }

    .card__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .card__header h3 {
        font-size: var(--font-h3);
    }

    .section__header {
        margin-bottom: var(--space-6);
    }

    .section__lead {
        font-size: 0.95rem;
    }

    .grid--cards {
        gap: var(--space-5);
    }

    .details ul {
        padding-left: var(--space-4);
    }

    .tag {
        padding: 0.25rem 0.6rem;
        font-size: 0.7rem;
    }

    .form input,
    .form textarea {
        padding: 0.75rem 0.9rem;
        font-size: 16px;
    }

    .cta__actions {
        flex-direction: column;
        gap: var(--space-3);
    }

    .cta__actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --font-title: clamp(1.5rem, 4.5vw, 2.4rem);
        --font-h2: clamp(1.1rem, 2.2vw, 1.5rem);
        --space-7: 1.5rem;
        --space-8: 2rem;
        --space-10: 2.5rem;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .section {
        padding: var(--space-6) 0;
    }

    .hero {
        padding-top: 4rem;
    }

    .hero__content {
        gap: var(--space-5);
    }

    .hero__proof {
        flex-direction: column;
        gap: var(--space-2);
    }

    .badge {
        padding: 0.3rem 0.65rem;
        font-size: 0.6rem;
    }

    .nav__links {
        padding: var(--space-4) var(--space-5);
        gap: var(--space-3);
    }

    .nav__links.is-open {
        max-height: 280px;
    }

    .btn {
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
    }

    .hero__panel-card {
        padding: var(--space-4);
    }

    .card {
        padding: var(--space-4);
    }

    .card__meta {
        gap: var(--space-2);
    }

    .section__header {
        margin-bottom: var(--space-5);
    }

    .section__title {
        margin-bottom: var(--space-3);
    }

    .details ul {
        gap: var(--space-2);
        padding-left: var(--space-3);
    }

    .form__group label {
        font-size: 0.8rem;
    }

    .form input,
    .form textarea {
        padding: 0.7rem 0.85rem;
        font-size: 16px;
        border-radius: var(--radius-md);
    }

    .cta {
        gap: var(--space-5);
    }
}

@media (max-width: 360px) {
    .hero__title {
        letter-spacing: -0.3px;
    }

    .badge {
        padding: 0.25rem 0.55rem;
        font-size: 0.55rem;
    }

    .container {
        padding: 0 var(--space-3);
    }
}

@media (orientation: landscape) and (max-height: 600px) {
    .hero {
        padding-top: 3rem;
        padding-bottom: 2rem;
    }

    .section {
        padding: var(--space-6) 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 2.5px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translateY(11px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-11px);
}

/* Hero */
.home-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    margin-top: 64px;
}

.home-section::before,
.home-section::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(1px);
}

.home-section::before {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.16) 0%, transparent 70%);
    top: -100px;
    right: -100px;
}

.home-section::after {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    bottom: 50px;
    left: -150px;
}

.home-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    width: 100%;
}

.home-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 520px;
    flex: 1;
}

.home-title {
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    font-weight: 800;
    color: #ffffff;
    margin-bottom: var(--space-4);
    line-height: 1.05;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--space-4);
    opacity: 0;
}

.tagline {
    font-size: 1.05rem;
    color: var(--muted);
    margin-bottom: var(--space-6);
    opacity: 0;
    line-height: 1.7;
}

.highlight-word {
    color: #ffffff;
    background-image: linear-gradient(120deg, rgba(56, 189, 248, 0.35), rgba(168, 85, 247, 0.45));
    background-repeat: no-repeat;
    background-position: 0 90%;
    background-size: 0% 35%;
    padding: 0 0.1em;
    animation: highlightSweep 1.2s ease forwards 0.5s;
}

.home-btns {
    display: flex;
    gap: var(--space-5);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
}

.hero-animate .subtitle {
    animation: fadeInUp 0.9s ease forwards 0.15s;
}

.hero-animate .tagline {
    animation: fadeInUp 0.9s ease forwards 0.3s;
}

.hero-animate .home-btns {
    animation: fadeInUp 0.9s ease forwards 0.45s;
}

/* Sphere */
.sphere-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
    height: 400px;
}

.sphere {
    position: relative;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    transform-style: preserve-3d;
    animation: rotate-sphere 22s linear infinite;
}

.sphere i {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    transform-style: preserve-3d;
    box-shadow: 0 0 75px rgba(99, 102, 241, 0.2), inset 0 0 75px rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(115, 116, 158, 0.3);
}

.sphere i:nth-child(1) { transform: rotateY(0deg); }
.sphere i:nth-child(2) { transform: rotateY(11.25deg); }
.sphere i:nth-child(3) { transform: rotateY(22.5deg); }
.sphere i:nth-child(4) { transform: rotateY(33.75deg); }
.sphere i:nth-child(5) { transform: rotateY(45deg); }
.sphere i:nth-child(6) { transform: rotateY(56.25deg); }
.sphere i:nth-child(7) { transform: rotateY(67.5deg); }
.sphere i:nth-child(8) { transform: rotateY(78.75deg); }
.sphere i:nth-child(9) { transform: rotateY(90deg); }
.sphere i:nth-child(10) { transform: rotateY(101.25deg); }
.sphere i:nth-child(11) { transform: rotateY(112.5deg); }
.sphere i:nth-child(12) { transform: rotateY(123.75deg); }
.sphere i:nth-child(13) { transform: rotateY(135deg); }
.sphere i:nth-child(14) { transform: rotateY(146.25deg); }
.sphere i:nth-child(15) { transform: rotateY(157.5deg); }
.sphere i:nth-child(16) { transform: rotateY(168.75deg); }
.sphere i:nth-child(17) { transform: rotateX(11.25deg); }
.sphere i:nth-child(18) { transform: rotateX(22.5deg); }
.sphere i:nth-child(19) { transform: rotateX(33.75deg); }
.sphere i:nth-child(20) { transform: rotateX(45deg); }
.sphere i:nth-child(21) { transform: rotateX(56.25deg); }
.sphere i:nth-child(22) { transform: rotateX(67.5deg); }
.sphere i:nth-child(23) { transform: rotateX(78.75deg); }
.sphere i:nth-child(24) { transform: rotateX(90deg); }
.sphere i:nth-child(25) { transform: rotateX(101.25deg); }
.sphere i:nth-child(26) { transform: rotateX(112.5deg); }
.sphere i:nth-child(27) { transform: rotateX(123.75deg); }
.sphere i:nth-child(28) { transform: rotateX(135deg); }
.sphere i:nth-child(29) { transform: rotateX(146.25deg); }
.sphere i:nth-child(30) { transform: rotateX(157.5deg); }
.sphere i:nth-child(31) { transform: rotateX(168.75deg); }
.sphere i:nth-child(32) { transform: rotateX(180deg); }

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn.primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.25);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.3);
}

.btn.secondary {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
    font-weight: 700;
}

.btn.secondary:hover {
    background: var(--primary);
    color: var(--text);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

/* Sections */
.section {
    padding: var(--space-8) 0;
    position: relative;
}

.section + .section {
    border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.bg-light {
    background-color: transparent;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 3rem);
    font-weight: 800;
    color: #ffffff;
    margin-bottom: var(--space-7);
    text-align: center;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: #9ca3af;
    font-size: 1.05rem;
    max-width: 600px;
    margin: -2.5rem auto var(--space-6);
}

/* About */
.about-values {
    list-style: none;
    display: grid;
    gap: var(--space-4);
    max-width: 860px;
    margin: 0 auto var(--space-6);
    color: #d1d5db;
    font-size: 1rem;
}

.about-values li {
    background: var(--surface-2);
    padding: var(--space-5);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.35);
}

.about-more {
    max-width: 860px;
    margin: 0 auto;
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: var(--space-5);
}

.about-more summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--primary);
    list-style: none;
}

.about-more summary::-webkit-details-marker {
    display: none;
}

.about-text {
    display: grid;
    gap: var(--space-4);
    margin-top: var(--space-4);
    color: #d1d5db;
}

.about-text p {
    line-height: 1.8;
}

/* Skills carousel */
.carousel-wrapper {
    width: 100%;
    height: 700px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin: var(--space-7) 0;
}

.carousel-inner {
    --w: 280px;
    --h: 400px;
    --translateZ: 450px;
    --rotateX: 1deg;
    --perspective: 1200px;
    position: absolute;
    width: var(--w);
    height: var(--h);
    transform-style: preserve-3d;
    transform: perspective(var(--perspective)) rotateX(var(--rotateX));
    cursor: grab;
    will-change: transform;
}

.carousel-inner:active {
    cursor: grabbing;
}

.carousel-card {
    position: absolute;
    width: var(--w);
    height: var(--h);
    border: 2px solid rgba(168, 85, 247, 0.5);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transform: rotateY(calc((360deg / var(--quantity)) * var(--index))) translateZ(var(--translateZ));
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.05) 0%, rgba(168, 85, 247, 0.1) 100%);
    box-shadow: 0 8px 32px rgba(168, 85, 247, 0.15);
    backdrop-filter: blur(10px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.carousel-inner.is-hovering .carousel-card {
    opacity: 0.6;
}

.carousel-card.is-active {
    opacity: 1;
    transform: rotateY(calc((360deg / var(--quantity)) * var(--index))) translateZ(var(--translateZ)) scale(1.02);
}

.card-content {
    pointer-events: auto;
    backface-visibility: hidden;
    padding: var(--space-6);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.carousel-card .card-icon {
    font-size: 3.2rem;
    margin-bottom: var(--space-4);
}

.carousel-card h3 {
    font-size: 1.3rem;
    color: #ffffff;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.carousel-card p {
    color: rgba(99, 102, 241, 0.9);
    font-weight: 600;
    margin-bottom: var(--space-4);
    font-size: 0.95rem;
}

.carousel-card .skills-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.carousel-card .skills-list li {
    padding-left: 1rem;
    color: #9ca3af;
    position: relative;
}

.carousel-card .skills-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: rgba(99, 102, 241, 0.8);
    font-weight: 700;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
}

.project-card {
    background: var(--surface-2);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.5s ease;
    z-index: 0;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 25px 60px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

@media (hover: none) {
    .project-card:active,
    .activity-item:active,
    .btn:active {
        transform: scale(0.99);
    }
}

.project-card:hover::before {
    left: 100%;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
    position: relative;
    z-index: 1;
}

.project-header h3 {
    font-size: 1.35rem;
    color: #ffffff;
    margin: 0;
    flex: 1;
}

.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.status-badge.in-dev {
    background: #fef3c7;
    color: #92400e;
}

.status-badge.completed {
    background: #d1fae5;
    color: #065f46;
}

.project-summary {
    color: #e2e8f0;
    font-weight: 600;
    margin-bottom: var(--space-3);
    position: relative;
    z-index: 1;
}

.project-description {
    color: #a0a0a0;
    margin-bottom: var(--space-5);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
}

.tech-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(99, 102, 241, 0.05));
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.project-more {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    padding-top: var(--space-3);
}

.project-more summary {
    cursor: pointer;
    color: var(--primary);
    font-weight: 700;
    list-style: none;
}

.project-more summary::-webkit-details-marker {
    display: none;
}

.project-features strong {
    display: block;
    color: #ffffff;
    margin: var(--space-3) 0 var(--space-2);
    font-weight: 700;
}

.project-features ul {
    list-style: none;
    padding-left: 0;
}

.project-features li {
    padding-left: 1.5rem;
    color: #a0a0a0;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    position: relative;
}

.project-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 800;
}

/* Experience */
.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    max-width: 760px;
    margin: 0 auto;
}

.timeline-item {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: var(--space-5);
    padding-left: var(--space-3);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 17px;
    top: 50px;
    bottom: -120px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), transparent);
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-marker {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    position: relative;
    margin-top: 0.5rem;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.timeline-marker::before {
    content: '•';
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text);
    font-weight: bold;
}

.timeline-content {
    padding: var(--space-5);
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.timeline-content:hover {
    transform: translateX(8px);
    box-shadow: 0 5px 20px rgba(168, 85, 247, 0.2);
}

.timeline-content h4 {
    font-size: 1.1rem;
    color: #ffffff;
    margin-bottom: 0.3rem;
}

.timeline-date {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
    display: block;
}

.timeline-content p {
    color: #a0a0a0;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Education */
.education-card {
    background: var(--surface-2);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    max-width: 720px;
    margin: 0 auto;
    box-shadow: var(--shadow);
    border: 2px solid var(--primary);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.education-card:hover {
    box-shadow: 0 15px 40px rgba(168, 85, 247, 0.3);
    transform: translateY(-4px);
}

.edu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    gap: var(--space-4);
}

.edu-header h3 {
    font-size: 1.35rem;
    color: #ffffff;
    margin: 0;
}

.edu-status {
    padding: 0.5rem 1.2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(99, 102, 241, 0.05));
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    border: 1px solid rgba(99, 102, 241, 0.3);
    white-space: nowrap;
}

.edu-details p {
    color: #a0a0a0;
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.edu-details strong {
    color: #ffffff;
}

/* Activities */
.activity-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-5);
    max-width: 1000px;
    margin: 0 auto;
}

.activity-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.activity-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.15);
    border-color: var(--primary);
}

.activity-icon {
    font-size: 2.3rem;
    min-width: 60px;
    text-align: center;
}

.activity-item h4 {
    font-size: 1.05rem;
    color: #ffffff;
    margin-bottom: 0.3rem;
}

.activity-item p {
    color: #a0a0a0;
    font-size: 0.92rem;
    line-height: 1.5;
}

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.5rem;
    color: #ffffff;
    margin-bottom: var(--space-4);
}

.contact-info > p {
    color: #a0a0a0;
    margin-bottom: var(--space-5);
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.contact-item {
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-label {
    display: block;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
}

.contact-item p,
.email-link {
    color: #a0a0a0;
    font-size: 0.95rem;
}

.email-link {
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    transition: color 0.2s ease;
}

.email-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-group {
    position: relative;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text);
    background: var(--surface-2);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    min-height: 44px;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #6b7280;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.2);
}

.contact-form textarea {
    resize: vertical;
    min-height: 140px;
}

.form-status {
    min-height: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
}

.form-status.success {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.form-status.error {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* Footer */
.footer {
    background: #0c1220;
    color: #a0a0a0;
    padding: var(--space-6) 0;
    text-align: center;
    font-size: 0.95rem;
    margin-top: var(--space-6);
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 1024px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

@media (max-width: 900px) {
    .home-wrapper {
        flex-direction: column;
        gap: var(--space-6);
    }

    .sphere-container {
        display: none;
    }

    .carousel-wrapper.is-flat {
        height: auto;
        overflow-x: auto;
        padding-bottom: var(--space-4);
        scroll-snap-type: x mandatory;
    }

    .carousel-wrapper.is-flat .carousel-inner {
        position: static;
        transform: none;
        height: auto;
        width: 100%;
        display: grid;
        grid-auto-flow: column;
        grid-auto-columns: 80%;
        gap: var(--space-4);
        padding: 0 0 var(--space-4);
    }

    .carousel-wrapper.is-flat .carousel-card {
        position: relative;
        transform: none;
        width: 100%;
        height: auto;
        pointer-events: auto;
        scroll-snap-align: center;
    }

    .carousel-wrapper.is-flat .card-content {
        padding: var(--space-5);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.25s ease;
        padding: 0;
        border-top: 1px solid rgba(168, 85, 247, 0.2);
    }

    .nav-links.active {
        max-height: 420px;
        padding: 0.75rem 0;
    }

    .nav-links a {
        display: block;
        padding: 0.9rem 2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        color: #d1d5db;
        font-size: 1rem;
    }

    .nav-links a::after {
        display: none;
    }

    .home-btns {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 320px;
    }

    .section {
        padding: var(--space-7) 0;
    }

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

    .activity-list {
        grid-template-columns: 1fr;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        padding-left: 0;
    }

    .timeline-item::before,
    .timeline-marker {
        display: none;
    }

    .timeline-content {
        border-left: none;
        border: 1px solid var(--border);
    }

    .project-description {
        display: none;
    }

    .carousel-card .skills-list {
        display: none;
    }

    .carousel-card p {
        margin-bottom: 0;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-5);
    }

    .navbar {
        padding: 1rem 0;
    }

    .home-section {
        min-height: auto;
        padding: var(--space-6) 0;
        margin-top: 70px;
    }

    .tagline {
        font-size: 0.95rem;
    }

    .project-card {
        padding: var(--space-5);
    }

    .education-card {
        padding: var(--space-5);
    }

    .contact-form input,
    .contact-form textarea {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .btn {
        padding: 0.85rem 1.5rem;
        font-size: 0.9rem;
    }

    .activity-item {
        padding: var(--space-4);
    }

    .activity-icon {
        font-size: 1.8rem;
    }

    .contact-form input,
    .contact-form textarea {
        padding: 0.85rem;
        font-size: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .sphere {
        animation: none;
    }
}