:root {
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --green-500: #22c55e;
    --black-950: #030508;
    --black-900: #0a0e14;
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html[data-theme='dark'],
:root:not([data-theme='light']) {
    --login-bg: var(--black-950);
    --login-mesh-1: rgba(37, 99, 235, 0.2);
    --login-mesh-2: rgba(34, 197, 94, 0.12);
    --login-card: rgba(17, 24, 39, 0.85);
    --login-border: rgba(59, 130, 246, 0.2);
    --login-text: #f1f5f9;
    --login-text-muted: #94a3b8;
    --login-danger-bg: rgba(239, 68, 68, 0.12);
    --login-danger-border: rgba(239, 68, 68, 0.35);
    --login-danger-text: #fca5a5;
}

html[data-theme='light'] {
    --login-bg: #eef2f7;
    --login-mesh-1: rgba(37, 99, 235, 0.1);
    --login-mesh-2: rgba(34, 197, 94, 0.08);
    --login-card: rgba(255, 255, 255, 0.95);
    --login-border: rgba(37, 99, 235, 0.15);
    --login-text: #0f172a;
    --login-text-muted: #475569;
    --login-danger-bg: rgba(239, 68, 68, 0.08);
    --login-danger-border: rgba(239, 68, 68, 0.25);
    --login-danger-text: #b91c1c;
}

body {
    font-family: var(--font-family);
    background: var(--login-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 24px;
    position: relative;
    isolation: isolate;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 70% 60% at 20% 10%, var(--login-mesh-1), transparent 55%),
        radial-gradient(ellipse 60% 50% at 80% 90%, var(--login-mesh-2), transparent 50%),
        var(--login-bg);
}

.login-container {
    background: var(--login-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--login-border);
    border-radius: 20px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    padding: 44px 40px;
    max-width: 420px;
    width: 100%;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header::before {
    content: '';
    display: block;
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--blue-500), var(--green-500));
    border-radius: 50%;
    box-shadow: 0 0 32px rgba(59, 130, 246, 0.4);
}

.login-header h1 {
    color: var(--login-text);
    margin: 0 0 8px 0;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.login-header p {
    color: var(--login-text-muted);
    margin: 0;
    font-size: 14px;
}

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-danger {
    background: var(--login-danger-bg);
    border: 1px solid var(--login-danger-border);
    color: var(--login-danger-text);
}

.btn-nex {
    width: 100%;
    background: linear-gradient(135deg, #0a0e14, #111827);
    color: white;
    border: 1px solid rgba(59, 130, 246, 0.25);
    padding: 16px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
    box-sizing: border-box;
}

.btn-nex:hover {
    border-color: var(--green-500);
    box-shadow: 0 0 24px rgba(34, 197, 94, 0.2);
    transform: translateY(-1px);
}

.btn-nex img {
    height: 56px;
    padding: 4px 10px;
    margin-right: 4px;
    vertical-align: middle;
}

.mt-3 {
    margin-top: 20px;
}

.login-theme-hint {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--login-text-muted);
}