/* Variables CSS */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
                 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
                 sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: linear-gradient(135deg, var(--bg-color) 0%, #1a1f3a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Container */
.container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

/* Login Card */
.login-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Formulaire */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.form-group input {
    padding: 12px 16px;
    background: rgba(100, 116, 139, 0.1);
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder {
    color: var(--text-secondary);
}

/* Password Input Wrapper */
.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    width: 100%;
    padding-right: 45px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: var(--transition);
    color: var(--text-secondary);
}

.toggle-password:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.eye-icon {
    display: inline-block;
}

/* Messages d'erreur */
.error-message {
    font-size: 0.85rem;
    color: var(--error-color);
    display: none;
    font-weight: 500;
}

.error-message.show {
    display: block;
    animation: slideDown 0.3s ease-out;
}

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

.form-message {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    display: none;
    animation: slideDown 0.3s ease-out;
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.form-message.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.form-message.loading {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Boutons */
.btn-login,
.btn-signup,
.btn-guest {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-login {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    width: 100%;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-login:active:not(:disabled) {
    transform: translateY(0);
}

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Footer */
.login-footer,
.login-guest {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.login-footer p,
.login-guest p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.btn-signup,
.btn-guest {
    background: transparent;
    color: var(--primary-color);
    border: 1.5px solid var(--primary-color);
    width: 100%;
}

.btn-signup:hover,
.btn-guest:hover {
    background: rgba(99, 102, 241, 0.1);
}

.login-guest {
    border-top: none;
    padding-top: 20px;
    margin-top: 20px;
}

/* Responsive Design */
@media (max-width: 600px) {
    body {
        padding: 15px;
    }

    .login-card {
        padding: 30px 20px;
    }

    .login-header h1 {
        font-size: 2rem;
    }

    .login-header p {
        font-size: 0.9rem;
    }

    .form-group input,
    .btn-login,
    .btn-signup,
    .btn-guest {
        font-size: 16px; /* Évite le zoom auto sur iOS */
    }

    .login-footer,
    .login-guest {
        padding-top: 20px;
    }
}

@media (max-width: 400px) {
    .login-card {
        padding: 25px 15px;
    }

    .login-header h1 {
        font-size: 1.75rem;
    }

    .login-form {
        gap: 20px;
    }

    .login-footer p,
    .login-guest p {
        font-size: 0.85rem;
    }
}

/* Mode sombre (par défaut) et mode clair */
@media (prefers-color-scheme: light) {
    :root {
        --primary-color: #4f46e5;
        --primary-dark: #4338ca;
        --bg-color: #f8fafc;
        --card-bg: #ffffff;
        --text-primary: #1e293b;
        --text-secondary: #64748b;
        --border-color: #e2e8f0;
    }

    body {
        background: linear-gradient(135deg, var(--bg-color) 0%, #f1f5f9 100%);
    }

    .login-card {
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    }
}

/* Accessibilité */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus visible pour l'accessibilité keyboard */
button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}