/* ===== Auth Modal - Celestial Anime Void ===== */

.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #050a10;
    overflow-y: auto;
    padding: 20px;
}

.auth-overlay.hidden {
    display: none;
}

/* --- Atmosphere container --- */
.auth-atmosphere {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

/* --- Deep nebula gradient layer --- */
.auth-nebula {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 80%, rgba(0, 168, 132, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 85% 15%, rgba(0, 92, 75, 0.1) 0%, transparent 55%),
        radial-gradient(ellipse 90% 50% at 50% 50%, rgba(10, 22, 40, 0.6) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 70% 70%, rgba(0, 168, 132, 0.04) 0%, transparent 50%),
        linear-gradient(170deg, #050a10 0%, #0a1628 40%, #081018 70%, #050a10 100%);
}

/* --- Starfield layers (3 depths for parallax feel) --- */
.auth-stars {
    position: absolute;
    inset: 0;
    border-radius: 0;
}

.auth-stars--1 {
    background-image:
        radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.7) 50%, transparent 100%),
        radial-gradient(1px 1px at 25% 42%, rgba(255,255,255,0.5) 50%, transparent 100%),
        radial-gradient(1px 1px at 47% 8%, rgba(255,255,255,0.6) 50%, transparent 100%),
        radial-gradient(1px 1px at 62% 35%, rgba(255,255,255,0.4) 50%, transparent 100%),
        radial-gradient(1px 1px at 78% 18%, rgba(255,255,255,0.7) 50%, transparent 100%),
        radial-gradient(1px 1px at 88% 58%, rgba(255,255,255,0.5) 50%, transparent 100%),
        radial-gradient(1px 1px at 35% 78%, rgba(255,255,255,0.6) 50%, transparent 100%),
        radial-gradient(1px 1px at 55% 65%, rgba(255,255,255,0.4) 50%, transparent 100%),
        radial-gradient(1px 1px at 92% 82%, rgba(255,255,255,0.5) 50%, transparent 100%),
        radial-gradient(1px 1px at 5% 55%, rgba(255,255,255,0.6) 50%, transparent 100%),
        radial-gradient(1px 1px at 42% 92%, rgba(255,255,255,0.4) 50%, transparent 100%),
        radial-gradient(1px 1px at 70% 48%, rgba(255,255,255,0.7) 50%, transparent 100%);
    animation: auth-twinkle1 6s ease-in-out infinite alternate;
}

.auth-stars--2 {
    background-image:
        radial-gradient(1.5px 1.5px at 15% 30%, rgba(0, 168, 132, 0.6) 50%, transparent 100%),
        radial-gradient(1px 1px at 38% 55%, rgba(255,255,255,0.35) 50%, transparent 100%),
        radial-gradient(1.5px 1.5px at 58% 22%, rgba(0, 200, 160, 0.5) 50%, transparent 100%),
        radial-gradient(1px 1px at 82% 72%, rgba(255,255,255,0.3) 50%, transparent 100%),
        radial-gradient(1px 1px at 20% 88%, rgba(255,255,255,0.4) 50%, transparent 100%),
        radial-gradient(1.5px 1.5px at 72% 12%, rgba(0, 168, 132, 0.45) 50%, transparent 100%),
        radial-gradient(1px 1px at 48% 42%, rgba(255,255,255,0.35) 50%, transparent 100%),
        radial-gradient(1px 1px at 90% 38%, rgba(255,255,255,0.3) 50%, transparent 100%);
    animation: auth-twinkle2 8s ease-in-out infinite alternate;
}

.auth-stars--3 {
    background-image:
        radial-gradient(2px 2px at 30% 20%, rgba(0, 168, 132, 0.4) 40%, transparent 100%),
        radial-gradient(2px 2px at 65% 75%, rgba(255,255,255,0.25) 40%, transparent 100%),
        radial-gradient(1.5px 1.5px at 85% 45%, rgba(0, 200, 160, 0.3) 40%, transparent 100%),
        radial-gradient(2px 2px at 12% 68%, rgba(255,255,255,0.2) 40%, transparent 100%),
        radial-gradient(1.5px 1.5px at 50% 85%, rgba(0, 168, 132, 0.35) 40%, transparent 100%);
    animation: auth-twinkle3 10s ease-in-out infinite alternate;
}

@keyframes auth-twinkle1 {
    0%   { opacity: 0.6; }
    50%  { opacity: 1; }
    100% { opacity: 0.7; }
}

@keyframes auth-twinkle2 {
    0%   { opacity: 0.8; }
    50%  { opacity: 0.4; }
    100% { opacity: 0.9; }
}

@keyframes auth-twinkle3 {
    0%   { opacity: 0.5; }
    50%  { opacity: 0.8; }
    100% { opacity: 0.3; }
}

/* --- Anime light beams (diagonal streaks) --- */
.auth-beams {
    position: absolute;
    inset: -50%;
    width: 200%;
    height: 200%;
    background:
        linear-gradient(125deg, transparent 42%, rgba(0, 168, 132, 0.03) 43%, rgba(0, 168, 132, 0.06) 43.5%, transparent 44.5%),
        linear-gradient(125deg, transparent 56%, rgba(0, 200, 160, 0.02) 57%, rgba(0, 200, 160, 0.05) 57.3%, transparent 58%),
        linear-gradient(125deg, transparent 68%, rgba(255, 255, 255, 0.015) 69%, rgba(255, 255, 255, 0.04) 69.2%, transparent 70%),
        linear-gradient(135deg, transparent 30%, rgba(0, 168, 132, 0.02) 31%, rgba(0, 168, 132, 0.04) 31.4%, transparent 32.5%),
        linear-gradient(135deg, transparent 75%, rgba(0, 200, 160, 0.015) 76%, rgba(0, 200, 160, 0.035) 76.3%, transparent 77%);
    animation: auth-beams-drift 20s linear infinite;
    transform-origin: center center;
}

@keyframes auth-beams-drift {
    0%   { transform: translateX(0) translateY(0); }
    100% { transform: translateX(-5%) translateY(-3%); }
}

/* --- Nebula glow orbs (enhanced) --- */
.auth-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.3;
    animation: auth-drift 12s ease-in-out infinite alternate;
}

.auth-glow--1 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #00A884 0%, rgba(0, 92, 75, 0.3) 50%, transparent 70%);
    top: -100px;
    right: -80px;
    animation-duration: 16s;
}

.auth-glow--2 {
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, #005C4B 0%, rgba(0, 40, 30, 0.4) 50%, transparent 70%);
    bottom: -80px;
    left: -60px;
    animation-duration: 12s;
    animation-direction: alternate-reverse;
}

.auth-glow--3 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 168, 132, 0.5) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -100px;
    opacity: 0.12;
    animation-duration: 18s;
    filter: blur(100px);
}

@keyframes auth-drift {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, -20px) scale(1.15); }
}

/* --- Floating teal particles --- */
.auth-particles span {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #00A884;
    border-radius: 50%;
    opacity: 0;
    animation: auth-float 8s ease-in-out infinite;
}

.auth-particles span:nth-child(1)  { left: 10%; top: 20%; animation-delay: 0s; width: 3px; height: 3px; }
.auth-particles span:nth-child(2)  { left: 25%; top: 70%; animation-delay: 1.5s; }
.auth-particles span:nth-child(3)  { left: 50%; top: 15%; animation-delay: 3s; width: 3px; height: 3px; }
.auth-particles span:nth-child(4)  { left: 70%; top: 60%; animation-delay: 0.8s; }
.auth-particles span:nth-child(5)  { left: 85%; top: 30%; animation-delay: 2.2s; width: 2.5px; height: 2.5px; }
.auth-particles span:nth-child(6)  { left: 15%; top: 85%; animation-delay: 4s; }
.auth-particles span:nth-child(7)  { left: 60%; top: 80%; animation-delay: 1s; width: 3px; height: 3px; }
.auth-particles span:nth-child(8)  { left: 40%; top: 45%; animation-delay: 5s; }
.auth-particles span:nth-child(9)  { left: 80%; top: 10%; animation-delay: 2.8s; }
.auth-particles span:nth-child(10) { left: 35%; top: 55%; animation-delay: 3.5s; width: 2.5px; height: 2.5px; }

@keyframes auth-float {
    0%, 100% { opacity: 0; transform: translateY(0) scale(1); }
    15%      { opacity: 0.7; }
    50%      { opacity: 0.25; transform: translateY(-50px) scale(1.8); }
    85%      { opacity: 0.5; }
}

/* --- Horizon glow (bottom edge, like distant city/anime skyline light) --- */
.auth-atmosphere::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30%;
    background: linear-gradient(to top, rgba(0, 168, 132, 0.04) 0%, transparent 100%);
    pointer-events: none;
}

/* --- Card --- */
.auth-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: rgba(17, 27, 33, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 168, 132, 0.12);
    border-radius: 20px;
    padding: 36px 28px 28px;
    animation: auth-cardIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    box-shadow:
        0 0 0 1px rgba(0, 168, 132, 0.06),
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 120px -40px rgba(0, 168, 132, 0.15);
}

@keyframes auth-cardIn {
    0%   { opacity: 0; transform: translateY(24px) scale(0.96); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- Header --- */
.auth-header {
    text-align: center;
    margin-bottom: 28px;
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 10px;
}

.auth-logo-icon {
    flex-shrink: 0;
}

.auth-title {
    font-family: var(--font);
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.auth-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* --- Tabs --- */
.auth-tabs {
    display: flex;
    position: relative;
    background: rgba(42, 57, 66, 0.4);
    border-radius: 10px;
    padding: 3px;
    margin-bottom: 24px;
}

.auth-tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 16px;
    cursor: pointer;
    border-radius: 8px;
    transition: color 0.25s ease, background 0.25s ease;
    position: relative;
    z-index: 1;
}

.auth-tab:hover {
    color: var(--text-primary);
}

.auth-tab.active {
    color: var(--text-primary);
    background: var(--bg-input);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* --- Forms --- */
.auth-forms {
    position: relative;
    min-height: 200px;
}

.auth-form {
    animation: auth-fadeIn 0.3s ease forwards;
}

.auth-form.hidden {
    display: none;
}

@keyframes auth-fadeIn {
    0%   { opacity: 0; transform: translateY(8px); }
    100% { opacity: 1; transform: translateY(0); }
}

.auth-field {
    margin-bottom: 16px;
}

.auth-field label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.auth-field input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 15px;
    padding: 12px 14px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.auth-field input::placeholder {
    color: rgba(134, 150, 160, 0.5);
}

.auth-field input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 168, 132, 0.12);
}

/* --- Error --- */
.auth-error {
    font-size: 13px;
    color: #ef4444;
    min-height: 18px;
    margin-bottom: 4px;
    line-height: 1.4;
}

.auth-error:empty {
    display: none;
}

/* --- Submit button --- */
.auth-submit {
    width: 100%;
    background: var(--accent);
    color: #111B21;
    font-family: var(--font);
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    padding: 13px 20px;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease, opacity 0.2s ease;
    margin-top: 4px;
}

.auth-submit:hover {
    background: var(--accent-hover);
}

.auth-submit:active {
    transform: scale(0.98);
}

.auth-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* --- Divider --- */
.auth-divider {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 20px 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- Anonymous button --- */
.auth-anon {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.auth-anon:hover {
    background: rgba(42, 57, 66, 0.4);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.auth-anon:active {
    transform: scale(0.98);
}

.auth-anon:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* --- Footer --- */
.auth-footer {
    text-align: center;
    font-size: 11px;
    color: rgba(134, 150, 160, 0.6);
    margin-top: 18px;
    line-height: 1.5;
}

/* --- Responsive --- */
@media (max-width: 480px) {
    .auth-overlay {
        padding: 12px;
        align-items: flex-start;
        padding-top: 40px;
    }

    .auth-card {
        padding: 28px 20px 22px;
        border-radius: 16px;
    }

    .auth-title {
        font-size: 22px;
    }
}

@media (min-height: 800px) {
    .auth-overlay {
        align-items: center;
    }
}