:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg-body: #F8FAFC;
    --text-main: #1E293B;
    --text-light: #64748B;
    --white: #FFFFFF;
    --border: #E2E8F0;
    --radius: 0.5rem;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --font-main: 'Inter', -apple-system, sans-serif;
}

/* Thèmes dynamiques */
[data-theme="marketing"] { --primary: #DB2777; --primary-hover: #BE185D; }
[data-theme="corporate"] { --primary: #0F172A; --bg-body: #1E293B; --text-main: #F1F5F9; --bg-card: #334155; }

body {
    font-family: var(--font-main);
    background: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Layout */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem;
}

main { flex: 1; display: flex; flex-direction: column; justify-content: center; }

/* Components */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgb(79 70 229 / 39%);
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }

.input-group {
    display: flex;
    gap: 0.5rem;
    background: var(--white);
    padding: 0.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.input-lg {
    flex: 1;
    border: none;
    padding: 1rem;
    font-size: 1.1rem;
    outline: none;
}

.card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.hidden { display: none; }
.fade-in { animation: fadeIn 0.5s ease-in; }

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

/* Mobile */
@media (max-width: 600px) {
    .input-group { flex-direction: column; }
    .btn { width: 100%; text-align: center; }
}