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

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #000;
    color: #fff;
    -webkit-font-smoothing: antialiased;
}

/* Start screen */
.start-screen {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease;
}

.start-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.start-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #ff2d95;
    text-shadow: 0 0 10px rgba(255, 45, 149, 0.8), 0 0 30px rgba(255, 45, 149, 0.5);
    background: none;
    border: 2px solid #ff2d95;
    box-shadow:
        0 0 15px rgba(255, 45, 149, 0.4),
        0 0 40px rgba(255, 45, 149, 0.2),
        0 0 80px rgba(255, 45, 149, 0.1),
        inset 0 0 20px rgba(255, 45, 149, 0.1);
    border-radius: 50%;
    width: 120px;
    height: 120px;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow:
            0 0 15px rgba(255, 45, 149, 0.4),
            0 0 40px rgba(255, 45, 149, 0.2),
            0 0 80px rgba(255, 45, 149, 0.1),
            inset 0 0 20px rgba(255, 45, 149, 0.1);
    }
    50% {
        box-shadow:
            0 0 25px rgba(255, 45, 149, 0.6),
            0 0 60px rgba(255, 45, 149, 0.35),
            0 0 100px rgba(255, 45, 149, 0.15),
            inset 0 0 30px rgba(255, 45, 149, 0.15);
    }
}

.start-btn:hover {
    border-color: #fff;
    box-shadow:
        0 0 30px rgba(255, 45, 149, 0.7),
        0 0 80px rgba(255, 45, 149, 0.4),
        0 0 120px rgba(255, 45, 149, 0.2),
        inset 0 0 40px rgba(255, 45, 149, 0.2);
    text-shadow: 0 0 15px rgba(255, 45, 149, 1), 0 0 40px rgba(255, 45, 149, 0.7);
    animation: none;
}

/* Background video */
.bg-video {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    z-index: 0;
    opacity: 0;
    transition: opacity 2s ease;
}

.bg-video.visible {
    opacity: 1;
}

.bg-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 1;
}

/* Page layout */
.page {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    padding: 40px 48px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

/* Navigation */
.nav {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-self: flex-end;
    opacity: 0;
    transform: translateY(-15px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.nav.visible {
    opacity: 1;
    transform: translateY(0);
}

.nav-item {
    display: flex;
    align-items: baseline;
    gap: 10px;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.6);
    cursor: default;
    transition: color 0.3s ease;
}

.nav-item:hover {
    color: #fff;
}

.nav-number {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.35);
}

.nav-label {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.03em;
}

/* Brand */
.brand {
    align-self: flex-start;
    margin-top: auto;
    margin-bottom: 8vh;
}

.brand-name {
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 300;
    letter-spacing: -0.01em;
    line-height: 1.1;
    color: #ff2d95;
    text-shadow: 0 0 20px rgba(255, 45, 149, 0.6), 0 0 60px rgba(255, 45, 149, 0.3);
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.brand-name.visible {
    opacity: 1;
    transform: translateY(0);
}

.brand-tagline {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.tagline-word {
    font-size: clamp(0.8rem, 1.2vw, 0.95rem);
    font-weight: 300;
    color: #ff2d95;
    text-shadow: 0 0 15px rgba(255, 45, 149, 0.5), 0 0 40px rgba(255, 45, 149, 0.2);
    letter-spacing: 0.05em;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease, transform 0.6s ease, color 1.5s ease, text-shadow 1.5s ease;
}

.tagline-word.visible {
    opacity: 1;
    transform: translateY(0);
}

.tagline-word.dim {
    color: rgba(255, 255, 255, 0.5);
    text-shadow: none;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .bg-video {
        display: none;
    }
}

/* Responsive */
@media (max-width: 480px) {
    .page {
        padding: 24px 20px;
    }

    .nav {
        gap: 12px;
    }
}

@media (orientation: portrait) {
    .brand {
        margin-bottom: 25vh;
    }
}