:root {
    --bg-deep: #05060d;
    --bg: #070912;
    --card: rgba(17, 22, 41, 0.72);
    --card-border: rgba(90, 120, 200, 0.22);
    --text: #f0f3ff;
    --muted: #9aa8d4;
    --accent: #5b7cff;
    --accent-2: #a855f7;
    --accent-hover: #4a6aee;
    --input-bg: rgba(8, 12, 28, 0.85);
    --input-border: rgba(80, 100, 160, 0.35);
    --alert-bg: rgba(60, 24, 40, 0.65);
    --alert-border: rgba(220, 90, 140, 0.45);
    --alert-text: #ffc8dd;
    --shadow-card: 0 28px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
    --font: "Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background-color: var(--bg-deep);
    min-height: 100vh;
    transition: color 0.35s ease, background-color 0.35s ease;
}

body.theme-light {
    --bg-deep: #e8eefc;
    --bg: #edf2fc;
    --card: rgba(255, 255, 255, 0.82);
    --card-border: rgba(70, 100, 180, 0.18);
    --text: #152238;
    --muted: #4a5d82;
    --accent: #3459ff;
    --accent-2: #9333ea;
    --accent-hover: #2848e0;
    --input-bg: rgba(255, 255, 255, 0.92);
    --input-border: rgba(70, 100, 160, 0.28);
    --alert-bg: rgba(255, 228, 236, 0.95);
    --alert-border: rgba(200, 80, 120, 0.35);
    --alert-text: #7a1f3d;
    --shadow-card: 0 24px 64px rgba(40, 70, 140, 0.12), 0 0 0 1px rgba(255, 255, 255, 0.7) inset;
}

.login-page {
    position: relative;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: clamp(16px, 4vw, 32px);
    overflow: hidden;
}

.login-page__aurora {
    position: fixed;
    inset: -20%;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 50% at 20% 20%, rgba(91, 124, 255, 0.35), transparent 55%),
        radial-gradient(ellipse 70% 45% at 80% 10%, rgba(168, 85, 247, 0.28), transparent 50%),
        radial-gradient(ellipse 60% 40% at 50% 90%, rgba(56, 189, 248, 0.15), transparent 45%),
        var(--bg-deep);
    animation: aurora-drift 22s ease-in-out infinite alternate;
}

@keyframes aurora-drift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(3%, -2%) scale(1.04);
    }
}

body.theme-light .login-page__aurora {
    background:
        radial-gradient(ellipse 80% 50% at 15% 15%, rgba(91, 124, 255, 0.45), transparent 55%),
        radial-gradient(ellipse 70% 45% at 85% 20%, rgba(168, 85, 247, 0.25), transparent 50%),
        radial-gradient(ellipse 60% 50% at 50% 100%, rgba(56, 189, 248, 0.2), transparent 50%),
        var(--bg-deep);
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: clamp(28px, 5vw, 36px) clamp(24px, 4vw, 32px);
    border-radius: 24px;
    border: 1px solid var(--card-border);
    background: var(--card);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: var(--shadow-card);
    animation: card-enter 0.65s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.login-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(
        135deg,
        rgba(91, 124, 255, 0.45),
        rgba(168, 85, 247, 0.25),
        rgba(56, 189, 248, 0.2)
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0.85;
}

@keyframes card-enter {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 4px;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px 8px 10px;
    border: 1px solid var(--input-border);
    border-radius: 999px;
    background: var(--input-bg);
    color: var(--text);
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.theme-toggle:hover {
    border-color: rgba(91, 124, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(91, 124, 255, 0.12);
}

.theme-toggle:active {
    transform: scale(0.98);
}

.theme-toggle__track {
    width: 36px;
    height: 20px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(91, 124, 255, 0.35), rgba(168, 85, 247, 0.35));
    position: relative;
    flex-shrink: 0;
    transition: opacity 0.2s ease;
}

.theme-toggle__track::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

body.theme-light .theme-toggle__track::after {
    transform: translateX(16px);
}

.brand {
    margin-bottom: 22px;
    animation: brand-reveal 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

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

.brand-line {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo {
    width: 22px;
    height: 22px;
    border-radius: 8px;
    display: inline-block;
    background: linear-gradient(145deg, #8eb4ff, var(--accent));
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.2) inset,
        0 10px 24px rgba(91, 124, 255, 0.35);
    animation: logo-pulse 4s ease-in-out infinite;
}

@keyframes logo-pulse {
    0%,
    100% {
        box-shadow:
            0 0 0 1px rgba(255, 255, 255, 0.2) inset,
            0 10px 24px rgba(91, 124, 255, 0.35);
    }
    50% {
        box-shadow:
            0 0 0 1px rgba(255, 255, 255, 0.25) inset,
            0 12px 32px rgba(168, 85, 247, 0.4);
    }
}

.brand-kicker {
    margin: 0;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 0.2em;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.login-title {
    margin: 12px 0 10px;
    font-size: clamp(1.75rem, 4vw, 2.125rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    background: linear-gradient(120deg, var(--text) 0%, var(--text) 45%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

body.theme-light .login-title {
    background: linear-gradient(120deg, #0f172a 0%, #1e3a5f 55%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

.brand-subtext {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.55;
    max-width: 34ch;
}

.brand-balance-hint {
    margin: 12px 0 0;
    padding-top: 12px;
    border-top: 1px solid color-mix(in srgb, var(--card-border) 80%, transparent);
    font-size: 12px;
    line-height: 1.45;
    color: var(--muted);
    max-width: 38ch;
}

.alert {
    margin: 14px 0;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--alert-border);
    background: var(--alert-bg);
    color: var(--alert-text);
    font-size: 13px;
    line-height: 1.45;
    animation: shake-in 0.45s ease;
}

@keyframes shake-in {
    0% {
        opacity: 0;
        transform: translateX(-6px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

.hint {
    margin: 0 0 16px;
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(91, 124, 255, 0.08);
    border: 1px solid rgba(91, 124, 255, 0.15);
    color: var(--muted);
    font-size: 13px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: form-reveal 0.75s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

@keyframes form-reveal {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.login-field:nth-child(2) {
    animation-delay: 0.05s;
}

.login-form label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.login-form input {
    width: 100%;
    border: 1px solid var(--input-border);
    border-radius: 12px;
    background: var(--input-bg);
    color: var(--text);
    padding: 13px 14px;
    font-family: inherit;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.login-form input:hover {
    border-color: rgba(91, 124, 255, 0.45);
}

.login-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(91, 124, 255, 0.18);
}

.login-submit {
    position: relative;
    margin-top: 6px;
    width: 100%;
    overflow: hidden;
    border: 0;
    border-radius: 14px;
    padding: 14px 18px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #fff;
    cursor: pointer;
    background: linear-gradient(135deg, var(--accent) 0%, #6366f1 50%, var(--accent-2) 100%);
    background-size: 200% 200%;
    animation: btn-gradient 6s ease infinite;
    transition: transform 0.12s ease, box-shadow 0.2s ease;
    box-shadow: 0 12px 32px rgba(91, 124, 255, 0.35);
}

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

.login-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(91, 124, 255, 0.45);
}

.login-submit:active {
    transform: translateY(0);
}

.login-submit__text {
    position: relative;
    z-index: 1;
}

.login-submit__shine {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        105deg,
        transparent 0%,
        rgba(255, 255, 255, 0.22) 45%,
        transparent 70%
    );
    transform: translateX(-100%);
    animation: shine-sweep 2.8s ease-in-out infinite;
}

@keyframes shine-sweep {
    0% {
        transform: translateX(-100%);
    }
    40%,
    100% {
        transform: translateX(200%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .login-page__aurora,
    .brand-logo,
    .login-submit,
    .login-submit__shine,
    .login-card,
    .brand,
    .login-form {
        animation: none;
    }

    .login-card {
        opacity: 1;
        transform: none;
    }

    .theme-toggle__track::after {
        transition: none;
    }
}