/* ==== Root & Theme ==== */
:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-primary: #0ff9ff;
    --color-primary-dark: #00c5c5;
    --color-secondary: #ff6ec7;
    --color-text: #e0e0e0;
    --color-muted: #777;
    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    --transition-speed: 0.3s;
}

/* ==== Global ==== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==== Typography ==== */
h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--color-primary);
}
h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: .5rem; }

p { margin-bottom: 1rem; }

/* ==== Layout ==== */
.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10,10,10,0.85);
    backdrop-filter: blur(8px);
    z-index: 1000;
}
.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav__logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-primary);
    text-decoration: none;
}
.nav__list {
    display: flex;
    gap: 2rem;
}
.nav__link {
    color: var(--color-muted);
    text-decoration: none;
    position: relative;
    transition: color var(--transition-speed);
}
.nav__link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-speed);
}
.nav__link:hover,
.nav__link:focus {
    color: var(--color-primary);
}
.nav__link:hover::after,
.nav__link:focus::after {
    width: 100%;
}

/* ==== Sections ==== */
section {
    padding: 8rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .8s ease-out, transform .8s ease-out;
}
section.visible {
    opacity: 1;
    transform: translateY(0);
}
.hero-section {
    min-height: 100vh;
    background: url('https://source.unsplash.com/featured/1600x900?night-sky,stars') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,10,10,0.7), rgba(0,0,0,0.9));
}
.hero__content {
    position: relative;
    z-index: 1;
}
.hero__title {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: .5rem;
}
.hero__subtitle {
    font-size: 1.5rem;
    margin-bottom 1.5rem;
    color: var(--color-muted);
}
.btn {
    display: inline-block;
    padding: .75rem 1.5rem;
    border: none;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 1rem;
    transition: background var(--transition-speed), transform var(--transition-speed);
    border-radius: 4px;
}
.btn--primary {
    background: var(--color-primary);
    color: #000;
}
.btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}
.btn--secondary {
    background: var(--color-secondary);
    color: #000;
}
.btn--secondary:hover {
    background: #ff4aa5;
    transform: translateY(-3px);
}

/* ==== Features ==== */
.features-section {
    background: var(--color-surface);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}
.feature-card {
    background: #1a1a1a;
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,0,0,.5);
}
.feature-card__img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}
.feature-card__title {
    padding: 1rem;
    color: var(--color-primary);
}
.feature-card__text {
    padding: 0 1rem 1rem;
    color: var(--color-muted);
}

/* ==== Gallery ==== */
.gallery-section {
    background: var(--color-bg);
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.gallery-item {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 6px;
    transition: transform var(--transition-speed), opacity var(--transition-speed);
    opacity: 0.9;
}
.gallery-item:hover {
    transform: scale(1.05);
    opacity: 1;
}

/* ==== Contact ==== */
.contact-section {
    background: var(--color-surface);
    text-align: center;
}
.contact__text {
    max-width: 600px;
    margin: 0 auto 2rem;
    color: var(--color-muted);
}
.contact__form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .75rem;
}
.contact__input {
    padding: .75rem 1rem;
    width: 280px;
    border: 1px solid var(--color-muted);
    border-radius: 4px;
    background: #111;
    color: var(--color-text);
}
.contact__input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ==== Footer ==== */
.site-footer {
    background: #000;
    color: var(--color-muted);
    text-align: center;
    padding: 2rem 1rem;
    margin-top: auto;
}
.social-links a {
    margin: 0 .5rem;
    color: var(--color-muted);
    font-size: 1.2rem;
    text-decoration: none;
    transition: color var(--transition-speed);
}
.social-links a:hover {
    color: var(--color-primary);
}

/* ==== Responsive ==== */
@media (max-width: 768px) {
    .hero__title { font-size: 2.8rem; }
    .hero__subtitle { font-size: 1.2rem; }
    .nav__list { gap: 1rem; }
}

/* ==== Scroll Reveal ==== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .8s ease-out, transform .8s ease-out;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}