:root {
    --bg-color: #000000;
    --header-bg: rgba(26, 26, 26, 0.95);
    --text-color: #ffffff;
    --accent-color: #9147ff;
    --accent-hover: #772ce8;
    --card-bg: #ffffff;
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--header-bg);
    padding: 15px 5%;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-title {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -1px;
    text-transform: uppercase;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    color: #b5b5b5;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
}

nav a:hover {
    color: var(--accent-color);
}

.hero-section {
    padding: 140px 20px 80px;
    max-width: 1000px;
    margin: 0 auto;
}

.container {
    width: min(1200px, 100%);
    margin: 0 auto;
    padding: 120px 20px 60px;
}

.section {
    max-width: 1000px;
    margin: 0 auto 40px;
    padding: 0 20px;
}

.section-title {
    font-size: 2rem;
    color: #ffffff;
    margin-bottom: 16px;
}

.section-text {
    max-width: 900px;
    color: #cfd8e0;
    font-size: 1rem;
    line-height: 1.8;
    text-align: left;
    margin-bottom: 24px;
}

.section-list {
    max-width: 900px;
    list-style: disc;
    padding-left: 24px;
    color: #cbd5e1;
    line-height: 1.8;
    margin-bottom: 24px;
}

.hero-section .section-text {
    margin: 0 auto 24px;
    text-align: center;
}

.contact-form {
    padding: 35px;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.contact-form h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #111111;
}

.contact-form .separation {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), transparent);
    margin-bottom: 24px;
}

.corps-formulaire {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.gauche,
.droite {
    flex: 1;
    min-width: 280px;
}

.boite {
    position: relative;
    margin-bottom: 18px;
}

.boite label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #222222;
}

.boite input,
.boite textarea {
    width: 100%;
    border: 1px solid #cfcfcf;
    border-radius: 10px;
    background: #ffffff;
    color: #111111;
    padding: 12px 14px;
    font-size: 1rem;
}

.boite input::placeholder,
.boite textarea::placeholder {
    color: #999;
}

.boite textarea {
    min-height: 180px;
    resize: vertical;
}

.boite i {
    position: absolute;
    left: 14px;
    top: 44px;
    color: var(--accent-color);
}

.boite input,
.boite textarea {
    padding-left: 42px;
}

.pied-formulaire {
    display: flex;
    justify-content: flex-end;
    margin-top: 8px;
}

.form-status {
    margin-top: 14px;
    min-height: 1.2em;
    font-size: 0.95rem;
    color: #1f7a1f;
}

.form-status.error {
    color: #b42318;
}

button:disabled {
    opacity: 0.7;
    cursor: wait;
}

button {
    background-color: var(--accent-color);
    color: #ffffff;
    border: none;
    padding: 14px 32px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    box-shadow: 0 4px 0 var(--accent-hover);
    transition: var(--transition);
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(145, 71, 255, 0.4);
    background-color: var(--accent-hover);
}

button:active {
    transform: translateY(1px);
}

.admin-card {
    border-radius: 24px;
    padding: 36px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(145, 71, 255, 0.18);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
}

.admin-card label {
    font-size: 0.95rem;
    font-weight: 700;
    color: #222;
    display: block;
    margin-bottom: 10px;
}

.admin-card input {
    width: 100%;
    border: 1px solid #d7d7d7;
    border-radius: 16px;
    padding: 16px 18px;
    font-size: 1rem;
    color: #111;
    background: #f8f8fb;
    margin-bottom: 20px;
}

.admin-card input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(145, 71, 255, 0.12);
}

.admin-card .section-title {
    color: #111;
    margin-bottom: 10px;
}

.admin-card .section-text {
    color: #4c4c63;
    margin-bottom: 24px;
}

.primary-button {
    width: 100%;
}

.submissions-list {
    display: grid;
    gap: 16px;
}

.submission-card {
    background: #f7f5ff;
    border: 1px solid rgba(145, 71, 255, 0.16);
    border-radius: 18px;
    padding: 20px;
    color: #1a1a2b;
}

.submission-header {
    font-size: 1rem;
    margin-bottom: 8px;
}

.submission-meta {
    font-size: 0.9rem;
    color: #5c5c7d;
    margin-bottom: 12px;
}

.submission-message {
    font-size: 0.95rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

footer {
    padding: 40px;
    text-align: center;
    background-color: #0a0a0a;
    border-top: 1px solid #222;
    color: #666;
    font-size: 0.85rem;
}