:root {
    --bg-dark: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary-color: #6366f1;
    --accent-color: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Background Orbs */
.background-orbs { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -1; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; animation: float 20s infinite ease-in-out alternate; }
.orb-1 { width: 400px; height: 400px; background: var(--primary-color); top: -100px; left: -100px; }
.orb-2 { width: 500px; height: 500px; background: var(--accent-color); bottom: -200px; right: -100px; animation-delay: -5s; }
.orb-3 { width: 300px; height: 300px; background: #3b82f6; top: 50%; left: 50%; animation-delay: -10s; }
@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, 40px) scale(1.1); }
}

/* Layout */
.auth-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
    max-width: 460px;
    padding: 20px;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Logo */
.auth-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
}

/* Card */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.auth-card {
    width: 100%;
    padding: 40px;
}

/* Tabs */
.auth-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 32px;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 10px;
    border-radius: 9px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Form */
.auth-form h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 6px;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 28px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.input-wrapper svg {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.input-wrapper input {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    width: 100%;
}

.input-wrapper input::placeholder { color: rgba(148, 163, 184, 0.5); }

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
}

.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.full-width { width: 100%; margin-top: 8px; }

.btn-spinner {
    animation: spin 0.8s linear infinite;
    font-size: 1.2rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Error */
.form-error {
    color: var(--warning);
    font-size: 0.85rem;
    padding: 10px 14px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 10px;
    display: none;
    margin-bottom: 8px;
    line-height: 1.5;
}

.form-error.show { display: block; }

/* Note */
.auth-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 16px;
    line-height: 1.6;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    border: 1px solid var(--glass-border);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: var(--success);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    opacity: 0;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
    pointer-events: none;
    white-space: nowrap;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 500px) {
    .auth-card { padding: 28px 24px; }
    .auth-form h2 { font-size: 1.5rem; }
}