*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg-primary: #14100c;
    --bg-card: #1e1812;
    --bg-input: #17120c;
    --border: #2e261d;
    --text-primary: #f5f0e8;
    --text-secondary: #a89880;
    --text-muted: #5c4e3d;
    --accent: #f59e0b;
    --accent-hover: #fbbf24;
    --red: #ef4444;
    --green: #22c55e;
    --radius: 12px;
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-theme="light"] {
    --bg-primary: #f8f6f3;
    --bg-card: #ffffff;
    --bg-input: #f0ece6;
    --border: #e2dcd3;
    --text-primary: #1a1510;
    --text-secondary: #6b5d4e;
    --text-muted: #a89880;
    --accent: #d97706;
    --accent-hover: #f59e0b;
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
}
[data-theme="light"] .form-group input:focus { background: #fff; }
[data-theme="dark-blue"] {
    --bg-primary: #080d1a;
    --bg-card: #0f1628;
    --bg-input: #0a1020;
    --border: #1a2440;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.6);
}
[data-theme="dark-blue"] body {
    background-image:
        radial-gradient(ellipse 80% 80% at 20% -20%, rgba(59,130,246,0.08), transparent),
        radial-gradient(ellipse 60% 60% at 90% 80%, rgba(37,99,235,0.05), transparent),
        radial-gradient(ellipse 40% 40% at 50% 50%, rgba(59,130,246,0.04), transparent);
}
[data-theme="dark-blue"] .brand .icon {
    background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(59,130,246,0.05));
    border-color: rgba(59,130,246,0.2);
    box-shadow: 0 4px 16px rgba(59,130,246,0.15);
}
[data-theme="dark-blue"] .brand .icon:hover {
    box-shadow: 0 6px 24px rgba(59,130,246,0.25);
}
[data-theme="dark-blue"] .form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}
[data-theme="dark-blue"] .login-btn {
    background: linear-gradient(135deg, var(--accent), #2563eb);
    box-shadow: 0 4px 16px rgba(59,130,246,0.25);
}
[data-theme="dark-blue"] .login-btn:hover {
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
    box-shadow: 0 6px 24px rgba(59,130,246,0.35);
}
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background-image:
        radial-gradient(ellipse 80% 80% at 20% -20%, rgba(217,119,6,0.08), transparent),
        radial-gradient(ellipse 60% 60% at 90% 80%, rgba(245,158,11,0.05), transparent),
        radial-gradient(ellipse 40% 40% at 50% 50%, rgba(217,119,6,0.04), transparent);
    transition: background 0.3s ease;
}
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(245,158,11,0.05) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(217,119,6,0.04) 0%, transparent 40%);
    pointer-events: none;
    animation: bgPulse 8s ease-in-out infinite alternate;
}
[data-theme="light"] body::before { opacity: 0.3; }
@keyframes bgPulse {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}
.theme-toggle-login {
    position: fixed;
    top: 1rem; right: 1rem;
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s ease;
    color: var(--text-secondary);
    font-size: 1.1rem;
    z-index: 10;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.theme-toggle-login:hover {
    color: var(--accent);
    border-color: var(--accent-border);
    transform: scale(1.05);
}
.login-container {
    position: relative;
    width: 100%;
    max-width: 420px;
    padding: 1rem;
    z-index: 1;
}
.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.8rem 2.2rem 2.2rem;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    animation: cardSlideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes cardSlideIn {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.brand {
    text-align: center;
    margin-bottom: 2.2rem;
}
.brand .icon {
    width: 60px; height: 60px;
    background: linear-gradient(135deg, rgba(245,158,11,0.15), rgba(245,158,11,0.05));
    border: 1px solid rgba(245,158,11,0.2);
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.1rem;
    font-size: 1.3rem; font-weight: 700; color: var(--accent);
    box-shadow: 0 4px 16px rgba(245,158,11,0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.brand .icon:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(245,158,11,0.25);
}
.brand h1 {
    font-size: 1.4rem; font-weight: 700; color: var(--text-primary);
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #e2e8f0, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.brand p {
    color: var(--text-secondary); font-size: 0.82rem; margin-top: 0.35rem;
}
.form-group {
    margin-bottom: 1.2rem;
}
.form-group label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.75rem; font-weight: 500;
    margin-bottom: 0.45rem;
    letter-spacing: 0.2px;
}
.form-group input {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition);
}
.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245,158,11,0.12);
    background: #080c12;
}
.form-group input::placeholder {
    color: var(--text-muted);
}
.login-btn {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(135deg, var(--accent), #d97706);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem; font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 0.6rem;
    box-shadow: 0 4px 16px rgba(245,158,11,0.25);
    letter-spacing: 0.2px;
}
.login-btn:hover {
    background: linear-gradient(135deg, var(--accent-hover), #e5980b);
    box-shadow: 0 6px 24px rgba(245,158,11,0.35);
    transform: translateY(-1px);
}
.login-btn:active { transform: scale(0.98); }
.login-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
.error-msg {
    margin-top: 1rem;
    padding: 0.65rem 0.9rem;
    border: 1px solid rgba(239,68,68,0.3);
    background: rgba(239,68,68,0.08);
    border-radius: 10px;
    color: var(--red);
    font-size: 0.82rem;
    text-align: center;
    display: none;
    animation: errorShake 0.4s ease;
}
@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-4px); }
    40% { transform: translateX(4px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}
.error-msg.show { display: block; }
.footer {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.72rem;
}
@media (max-width: 480px) {
    .login-card { padding: 2rem 1.2rem 1.6rem; }
    .brand h1 { font-size: 1.2rem; }
    .brand .icon { width: 48px; height: 48px; font-size: 1rem; }
}