/**
 * Login Page CSS - Clouds (light) & Deep Night Sky (dark)
 */

/* ===== CONTAINER ===== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #dbeafe 0%, #e8ecf4 35%, #f0f2f5 70%, #f8fafc 100%);
    transition: background 0.5s ease;
}

[data-theme="dark"] .login-container {
    background: #000005;
}

/* No pseudo-elements in light mode */
.login-container::before,
.login-container::after {
    content: none;
}

/* Very subtle deep blue nebula glow — dark mode */
[data-theme="dark"] .login-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 20% 45%, rgba(15, 40, 120, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, rgba(5, 80, 100, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 85%, rgba(10, 30, 80, 0.12) 0%, transparent 45%);
    animation: nebulaDrift 30s ease-in-out infinite alternate;
    z-index: 0;
}

@keyframes nebulaDrift {
    0%   { transform: translate(0, 0) rotate(0deg) scale(1); }
    50%  { transform: translate(2%, -1.5%) rotate(1deg) scale(1.02); }
    100% { transform: translate(-1%, 1%) rotate(-0.5deg) scale(1); }
}

/* ===== STARS — real elements generated by JS ===== */
.stars-layer {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease;
    animation: none;
}

[data-theme="dark"] .stars-layer {
    opacity: 1;
    animation: starsFieldDrift 50s ease-in-out infinite;
}

/* Remove old pseudo-element stars */
.stars-layer::before,
.stars-layer::after {
    content: none;
}

/* Individual star element */
.star {
    position: absolute;
    border-radius: 50%;
    background: #ffffff;
    animation: starTwinkle 3s ease-in-out infinite alternate;
}

@keyframes starTwinkle {
    0%   { opacity: 0.3; transform: scale(0.8); }
    50%  { opacity: 1; transform: scale(1.1); }
    100% { opacity: 0.5; transform: scale(0.9); }
}

/* Whole star field drifts slowly */
@keyframes starsFieldDrift {
    0%   { transform: translate(0, 0); }
    20%  { transform: translate(12px, -8px); }
    40%  { transform: translate(-6px, 15px); }
    60%  { transform: translate(18px, 5px); }
    80%  { transform: translate(-10px, -12px); }
    100% { transform: translate(0, 0); }
}

/* ===== CLOUDS — JS-generated, light mode only ===== */
.clouds-layer {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

[data-theme="dark"] .clouds-layer {
    opacity: 0;
}

.cloud {
    position: absolute;
    width: 220px;
    height: 50px;
    background: #ffffff;
    border-radius: 100px;
    pointer-events: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.04);
    --cscale: 1;
    transform: scale(var(--cscale));
}

.cloud::before,
.cloud::after {
    content: '';
    position: absolute;
    background: #ffffff;
    border-radius: 50%;
}

.cloud::before {
    width: 90px;
    height: 90px;
    top: -50px;
    left: 35px;
}

.cloud::after {
    width: 110px;
    height: 78px;
    top: -38px;
    left: 90px;
}

/* Two drift directions — scale preserved via CSS variable */
@keyframes cloudGoRight {
    0%   { transform: translateX(-350px) scale(var(--cscale, 1)); }
    100% { transform: translateX(calc(100vw + 350px)) scale(var(--cscale, 1)); }
}

@keyframes cloudGoLeft {
    0%   { transform: translateX(calc(100vw + 350px)) scale(var(--cscale, 1)); }
    100% { transform: translateX(-350px) scale(var(--cscale, 1)); }
}

/* ===== LOGIN CARD ===== */
.login-card {
    border-radius: 20px;
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
    background: #ffffff;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: background 0.5s ease, box-shadow 0.5s ease, border-color 0.5s ease;
}

[data-theme="dark"] .login-card {
    background: rgba(5, 7, 15, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow:
        0 0 50px rgba(20, 50, 120, 0.08),
        0 25px 70px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Animated rotating border glow — dark mode only */
.login-card::before {
    content: none;
}

@property --card-angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

[data-theme="dark"] .login-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 21px;
    background: conic-gradient(
        from var(--card-angle),
        rgba(59, 130, 246, 0.3),
        rgba(6, 182, 212, 0.15),
        transparent 35%,
        transparent 65%,
        rgba(14, 165, 233, 0.12),
        rgba(59, 130, 246, 0.3)
    );
    z-index: -1;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    padding: 1px;
    animation: cardBorderSpin 8s linear infinite;
}

@keyframes cardBorderSpin {
    0%   { --card-angle: 0deg; }
    100% { --card-angle: 360deg; }
}

/* ===== HEADER ===== */
.login-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.login-logo {
    font-size: 50px;
    margin-bottom: var(--spacing-md);
    animation: rocketFloat 5s ease-in-out infinite;
}

[data-theme="dark"] .login-logo {
    filter: drop-shadow(0 0 15px rgba(59, 130, 246, 0.4));
}

@keyframes rocketFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-5px); }
}

.login-title {
    font-size: 28px;
    font-weight: 800;
    margin: 0 0 var(--spacing-xs) 0;
    letter-spacing: 4px;
    color: var(--text-primary);
    transition: color 0.5s ease;
}

[data-theme="dark"] .login-title {
    background: linear-gradient(135deg, #e2e8f0 0%, #7dd3fc 50%, #e2e8f0 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleShimmer 6s ease-in-out infinite;
}

@keyframes titleShimmer {
    0%, 100% { background-position: 0% 50%; }
    50%      { background-position: 100% 50%; }
}

.login-subtitle {
    font-size: var(--font-size-base);
    letter-spacing: 0.3px;
    color: var(--text-tertiary);
}

[data-theme="dark"] .login-subtitle {
    color: rgba(140, 170, 210, 0.6);
}

/* ===== TABS ===== */
.login-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-primary);
}

[data-theme="dark"] .login-tabs {
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

.login-tab {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    background: none;
    color: var(--text-muted);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.login-tab:hover {
    color: var(--text-secondary);
}

[data-theme="dark"] .login-tab:hover {
    color: rgba(200, 215, 240, 0.8);
}

.login-tab.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

/* ===== FORM INPUTS ===== */
.login-container .form-label {
    color: var(--text-secondary);
}

.login-container .form-input {
    border-radius: 12px;
    padding: 13px 16px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: var(--bg-input);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
}

.login-container .form-input::placeholder {
    color: var(--text-muted);
}

.login-container .form-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
    outline: none;
}

[data-theme="dark"] .login-container .form-input {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.07);
    color: #f1f5f9;
}

[data-theme="dark"] .login-container .form-input::placeholder {
    color: rgba(148, 163, 184, 0.35);
}

[data-theme="dark"] .login-container .form-input:focus {
    border-color: rgba(59, 130, 246, 0.45);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08), 0 0 20px rgba(59, 130, 246, 0.05);
    background: rgba(255, 255, 255, 0.05);
}

.login-container .form-help {
    color: var(--text-muted);
    font-size: 12px;
}

/* ===== SUBMIT BUTTON ===== */
.login-container .btn-primary {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border: none;
    color: #ffffff;
    font-weight: 600;
    font-size: 15px;
    padding: 14px 24px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25);
    letter-spacing: 0.3px;
}

.login-container .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 25px rgba(37, 99, 235, 0.35);
    background: linear-gradient(135deg, #1d4ed8, #2563eb);
}

.login-container .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
}

[data-theme="dark"] .login-container .btn-primary {
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.25), 0 0 30px rgba(59, 130, 246, 0.06);
}

[data-theme="dark"] .login-container .btn-primary:hover {
    box-shadow: 0 6px 30px rgba(59, 130, 246, 0.4), 0 0 40px rgba(59, 130, 246, 0.1);
}

/* ===== FORM VISIBILITY ===== */
.login-form {
    display: none;
}

.login-form.active {
    display: block;
}

/* ===== FOOTER ===== */
.login-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.login-footer a {
    color: var(--accent-blue);
    font-weight: 500;
}

/* ===== THEME TOGGLE ===== */
.login-container .theme-toggle {
    background: transparent;
    border: 1px solid var(--border-primary);
    color: var(--text-tertiary);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-theme="dark"] .login-container .theme-toggle {
    border-color: rgba(255, 255, 255, 0.08);
    color: rgba(200, 215, 240, 0.4);
}

.login-container .theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

[data-theme="dark"] .login-container .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #e2e8f0;
}

/* ===== ENTRANCE ANIMATION ===== */
.login-card {
    animation: cardEntrance 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.login-logo {
    animation: logoEntrance 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both, rocketFloat 5s ease-in-out 1s infinite;
}

.login-title {
    animation: fadeSlideUp 0.6s ease-out 0.35s both;
}

.login-subtitle {
    animation: fadeSlideUp 0.6s ease-out 0.45s both;
}

.login-tabs {
    animation: fadeSlideUp 0.5s ease-out 0.55s both;
}

.login-form.active .form-group:nth-child(1) {
    animation: fadeSlideUp 0.5s ease-out 0.65s both;
}

.login-form.active .form-group:nth-child(2) {
    animation: fadeSlideUp 0.5s ease-out 0.75s both;
}

.login-form.active .btn-primary {
    animation: btnEntrance 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.85s both;
}

.login-footer {
    animation: fadeSlideUp 0.4s ease-out 0.95s both;
}

@keyframes cardEntrance {
    0%   { opacity: 0; transform: translateY(40px) scale(0.96); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes logoEntrance {
    0%   { opacity: 0; transform: translateY(-20px) scale(0.5); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes fadeSlideUp {
    0%   { opacity: 0; transform: translateY(15px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes btnEntrance {
    0%   { opacity: 0; transform: translateY(10px) scale(0.9); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== EXIT TRANSITION (after successful login) ===== */
.login-exit-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Expanding circle wipe */
.login-exit-overlay::before {
    content: '';
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent-blue, #2563eb);
    transform: scale(0);
    animation: exitWipe 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

[data-theme="dark"] .login-exit-overlay::before {
    background: #0a0a1a;
}

@keyframes exitWipe {
    0%   { transform: scale(0); opacity: 0.8; }
    100% { transform: scale(80); opacity: 1; }
}

/* Card exit */
.login-card.exit-active {
    animation: cardExit 0.5s cubic-bezier(0.4, 0, 1, 1) forwards;
}

@keyframes cardExit {
    0%   { opacity: 1; transform: scale(1) translateY(0); }
    100% { opacity: 0; transform: scale(0.92) translateY(-20px); }
}

/* Success rocket launch */
.exit-rocket {
    position: fixed;
    z-index: 101;
    font-size: 40px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: rocketLaunch 1s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards;
    opacity: 0;
    filter: drop-shadow(0 0 20px rgba(59, 130, 246, 0.6));
}

@keyframes rocketLaunch {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(1) rotate(-15deg); }
    30%  { opacity: 1; transform: translate(-50%, -50%) scale(1.3) rotate(-10deg); }
    100% { opacity: 0; transform: translate(-50%, -200%) scale(0.6) rotate(-5deg); }
}

/* Welcome text that appears during exit */
.exit-welcome {
    position: fixed;
    z-index: 101;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: #ffffff;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 3px;
    opacity: 0;
    animation: welcomeFade 0.8s ease-out 0.5s forwards;
    white-space: nowrap;
}

@keyframes welcomeFade {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
    50%  { opacity: 1; transform: translate(-50%, -50%) scale(1.02); }
    100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
    .login-card {
        padding: var(--spacing-lg);
        margin: 0 var(--spacing-sm);
    }

    .login-title {
        font-size: 22px;
        letter-spacing: 3px;
    }

    .login-logo {
        font-size: 42px;
    }

    .clouds-layer { display: none; }
}