:root {
    --login-primary: #6366f1;
    --login-primary-dark: #4f46e5;
    --login-bg-start: #0f172a;
    --login-bg-end: #1e1b4b;
    --login-card-bg: rgba(255, 255, 255, 0.97);
    --login-text: #1e293b;
    --login-muted: #64748b;
    --login-border: #e2e8f0;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, var(--login-bg-start) 0%, var(--login-bg-end) 50%, #312e81 100%);
    position: relative;
    overflow: hidden;
}

body.login-page::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
    animation: loginBgShift 20s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes loginBgShift {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-2%, -2%) rotate(3deg); }
}

.login-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: var(--login-card-bg);
    border-radius: 16px;
    padding: 40px 36px 36px;
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.35),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    animation: loginCardIn 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

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

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

.login-header .login-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--login-primary) 0%, #8b5cf6 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.login-header .login-icon i {
    font-size: 24px;
    color: #fff;
}

.login-header h1 {
    margin: 0 0 6px;
    font-size: 22px;
    font-weight: 700;
    color: var(--login-text);
    letter-spacing: -0.3px;
}

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

.login-form .form-group {
    margin-bottom: 20px;
    position: relative;
}

.login-form .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--login-muted);
    margin-bottom: 8px;
}

.login-form .input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.login-form .input-wrap i.input-icon {
    position: absolute;
    left: 14px;
    color: #94a3b8;
    font-size: 15px;
    z-index: 1;
    pointer-events: none;
}

.login-form .input-wrap input {
    width: 100%;
    height: 46px;
    padding: 0 44px 0 42px;
    border: 1.5px solid var(--login-border);
    border-radius: 10px;
    font-size: 14px;
    color: var(--login-text);
    background: #f8fafc;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.login-form .input-wrap input:focus {
    border-color: var(--login-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.login-form .input-wrap input::placeholder {
    color: #94a3b8;
}

.login-form .input-wrap input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 1000px #f8fafc inset !important;
}

.login-form .toggle-password {
    position: absolute;
    right: 14px;
    color: #94a3b8;
    cursor: pointer;
    font-size: 15px;
    transition: color 0.2s;
    z-index: 1;
}

.login-form .toggle-password:hover {
    color: var(--login-primary);
}

.login-form .captcha-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

.login-form .captcha-group .input-wrap {
    flex: 1;
}

.login-form .captcha-group img {
    height: 46px;
    border-radius: 10px;
    border: 1.5px solid var(--login-border);
    cursor: pointer;
    transition: border-color 0.2s;
}

.login-form .captcha-group img:hover {
    border-color: var(--login-primary);
}

.login-btn {
    width: 100%;
    height: 48px;
    margin-top: 8px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--login-primary) 0%, #7c3aed 100%);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.login-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.login-btn:active:not(:disabled) {
    transform: scale(0.98);
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
}

.login-btn i {
    margin-right: 4px;
}

.login-btn:disabled {
    cursor: not-allowed;
    opacity: 0.75;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

@media screen and (max-width: 480px) {
    .login-card {
        padding: 32px 24px 28px;
    }

    .login-header h1 {
        font-size: 20px;
    }
}