:root {
    --bg-color: #0d0d0d;
    --accent-color: #ffffff;
    --text-muted: #888888;
    --font-main: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--accent-color);
    font-family: var(--font-main);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    /* Simulation de texture béton par dégradé radial */
    background: radial-gradient(circle at center, #1a1a1a 0%, #0d0d0d 100%);
}

/* Effet de grain architectural optionnel */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://www.transparenttextures.com/patterns/concrete-wall.png');
    opacity: 0.05;
    pointer-events: none;
}

.content {
    text-align: center;
    z-index: 1;
    width: 90%;
    max-width: 800px;
    animation: fadeIn 2s ease-out;
}

.logo {
    font-weight: 200;
    letter-spacing: 0.8rem;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.tagline {
    font-weight: 300;
    font-size: 1.1rem;
    color: var(--text-muted);
    letter-spacing: 0.2rem;
    margin-bottom: 4rem;
    text-transform: uppercase;
}

/* Compte à rebours */
.countdown-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 5rem;
}

.time-segment {
    display: flex;
    flex-direction: column;
}

.number {
    font-size: 3.5rem;
    font-weight: 200;
    line-height: 1;
}

.label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Newsletter */
.newsletter {
    max-width: 400px;
    margin: 0 auto;
}

#newsletter-form {
    display: flex;
    border-bottom: 1px solid #333;
    padding-bottom: 5px;
    transition: border-color 0.3s;
}

#newsletter-form:focus-within {
    border-color: var(--accent-color);
}

input[type="email"] {
    background: transparent;
    border: none;
    color: var(--accent-color);
    flex-grow: 1;
    padding: 10px;
    font-family: var(--font-main);
    font-weight: 200;
    outline: none;
}

button {
    background: transparent;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 0.7rem;
    letter-spacing: 0.1rem;
    padding: 10px;
    transition: opacity 0.3s;
}

button:hover {
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 600px) {
    .logo { font-size: 1.8rem; letter-spacing: 0.4rem; }
    .number { font-size: 2rem; }
    .tagline { font-size: 0.9rem; margin-bottom: 3rem; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}