:root {
    --primary-purple: #463073;
    --primary-orange: #C56A1D;
    --accent-green: #3F8F46;
    --neutral-gray: #757575;
    --bg-light: #EEEEEE;
    --bg-dark: #1A1A2E;
    --text-primary: #111111;
    --text-secondary: #757575;
    --text-on-dark: #FFFFFF;
    --dark-bg: var(--bg-dark);
    --dark-surface: #141426;
    --dark-card: var(--bg-dark);
    --dark-border: rgba(255,255,255,0.08);
    --accent: var(--primary-purple);
    --accent-light: var(--primary-purple);
    --accent-glow: rgba(70,48,115,0.14);
    --auth-text-primary: var(--text-on-dark);
    --auth-text-secondary: rgba(255,255,255,0.72);
    --gradient-1: linear-gradient(135deg, var(--primary-purple), var(--primary-orange));
    --glass: rgba(255,255,255,0.04);
    --glass-border: rgba(255,255,255,0.08);
    --danger: #ef4444;
    --success: var(--accent-green);
}

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

body.auth-page {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--dark-bg);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1500px;
    overflow: hidden;
}

/* Background orbs */
.orb {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}
.orb-1 {
    top: -200px;
    left: -200px;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    animation: orbFloat 12s ease-in-out infinite alternate;
}
.orb-2 {
    bottom: -200px;
    right: -200px;
    background: radial-gradient(circle, rgba(197,106,29,0.2), transparent 70%);
    animation: orbFloat 12s ease-in-out infinite alternate-reverse;
}
@keyframes orbFloat {
    from { transform: translate(-40px, -40px) scale(1); }
    to { transform: translate(40px, 40px) scale(1.1); }
}

/* ===== 3D FLIP ===== */
.main-container {
    width: 440px;
    position: relative;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.6, -0.28, 0.735, 0.045);
    z-index: 1;
}
.main-container.flipped {
    transform: rotateY(180deg);
}

.card-face {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 24px;
    background: var(--dark-card);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 20px rgba(24,24,42, 0.08), inset 0 1px 0 rgba(255,255,255,0.05);
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.front {
    z-index: 2;
    transform: rotateY(0deg);
}
.back {
    z-index: 1;
    transform: rotateY(180deg);
}

/* Logo */
.auth-logo {
    height: 60px;
    width: auto;
    border-radius: 18px;
    object-fit: contain;
    margin-bottom: 20px;
}

/* Headings */
.card-face h2 {
    font-family: 'Cinzel', serif;
    color: var(--auth-text-primary);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}
.card-face .subtitle {
    color: var(--auth-text-secondary);
    font-size: 13px;
    margin-bottom: 24px;
}

/* Alert */
.auth-alert {
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 12px;
    margin-bottom: 14px;
    text-align: center;
}
.auth-alert.danger {
    background: rgba(239,68,68,0.1);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.2);
}
.auth-alert.success {
    background: rgba(63,143,70,0.06);
    color: var(--success);
    border: 1px solid rgba(63,143,70,0.10);
}
.auth-alert a { color: var(--accent-light); text-decoration: underline; }

/* Inputs */
.input-box {
    width: 100%;
    position: relative;
    margin-bottom: 14px;
}
.input-box i.field-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-light);
    font-size: 16px;
    pointer-events: none;
}
.input-box input {
    width: 100%;
    padding: 12px 42px 12px 42px;
    background: var(--dark-surface);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--auth-text-primary);
    font-size: 16px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.input-box input::placeholder { color: var(--neutral-gray); font-size: 16px; }
.input-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Password toggle */
.toggle-pw {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--neutral-gray);
    cursor: pointer;
    font-size: 16px;
    transition: color 0.2s;
}
.toggle-pw:hover { color: var(--accent-light); }

/* Extras row */
.extras-row {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    font-size: 13px;
}
.remember-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--auth-text-secondary);
    cursor: pointer;
}
.remember-label input[type="checkbox"] {
    accent-color: var(--accent);
    width: 15px;
    height: 15px;
}
.extras-row a {
    color: var(--accent-light);
    text-decoration: none;
    font-weight: 500;
}
.extras-row a:hover { text-decoration: underline; }

/* Action button */
.action-btn {
    width: 100%;
    padding: 13px;
    background: var(--gradient-1);
    border: none;
    border-radius: 12px;
    color: #fff;
    font-weight: 700;
    font-size: 14px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(24,24,42, 0.10);
}
.action-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}
.action-btn .spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Switch text */
.switch-text {
    margin-top: auto;
    padding-top: 20px;
    color: var(--auth-text-secondary);
    font-size: 13px;
}
.switch-link {
    color: var(--accent-light);
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    background: none;
    border: none;
    font-size: 13px;
    font-family: inherit;
}
.switch-link:hover { text-decoration: underline; color: var(--primary-orange); }

/* Toast */
.auth-toast {
    position: fixed;
    top: 24px;
    right: 24px;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Plus Jakarta Sans', sans-serif;
    z-index: 9999;
    transform: translateX(calc(100% + 30px));
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(12px);
}
.auth-toast.show { transform: translateX(0); }
.auth-toast.error {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.25);
}
.auth-toast.success {
    background: rgba(63,143,70,0.08);
    color: var(--success);
    border: 1px solid rgba(63,143,70,0.12);
}

/* Responsive */
@media (max-width: 480px) {
    body.auth-page {
        padding: 12px 12px;
        align-items: center;
    }
    .main-container {
        width: 88%;
    }
    .card-face {
        padding: 22px 18px;
        border-radius: 18px;
    }
    .card-face h2 { font-size: 18px; }
    .card-face .subtitle { font-size: 12px; margin-bottom: 16px; }
    .auth-logo { height: 50px; width: auto; margin-bottom: 14px; }
    .input-box { margin-bottom: 10px; }
    .input-box input { padding: 10px 38px 10px 38px; font-size: 16px; }
    .action-btn { padding: 11px; font-size: 13px; }
    .extras-row { font-size: 12px; margin-bottom: 12px; }
    .switch-text { font-size: 12px; padding-top: 14px; }
}