:root {
    --page-bg: #07111f;
    --surface: rgba(255, 255, 255, 0.08);
    --surface-strong: rgba(255, 255, 255, 0.14);
    --line: rgba(255, 255, 255, 0.18);
    --text: #f7fbff;
    --muted: #b7c4d4;
    --cyan: #38d5ff;
    --green: #5ee28d;
    --coral: #ff8a6b;
    --brand-gradient: linear-gradient(135deg, var(--cyan), var(--green));
    --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.38);
    --radius-sm: 8px;
    --radius-lg: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--page-bg);
}

body {
    min-height: 100vh;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto,
                 "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background:
        radial-gradient(circle at 12% 8%, rgba(56, 213, 255, 0.22), transparent 30%),
        radial-gradient(circle at 78% 18%, rgba(94, 226, 141, 0.16), transparent 28%),
        linear-gradient(135deg, #07111f 0%, #122338 48%, #101323 100%);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
    background-size: 52px 52px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 82%);
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
    z-index: 1;
}

.login-card {
    width: 420px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: rgba(7, 17, 31, 0.72);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(18px);
    overflow: hidden;
}

.login-card::before {
    content: "";
    display: block;
    height: 3px;
    background: var(--brand-gradient);
}

.login-header {
    text-align: center;
    padding: 30px 28px 8px;
}

.login-header h2 {
    margin: 0;
    color: var(--text);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0;
}

.login-card form {
    padding: 22px 28px 28px;
}

.login-card form.is-hidden {
    display: none;
}

.login-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin: 14px 28px 0;
    padding: 4px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
}

.login-tab {
    height: 34px;
    border: 0;
    border-radius: var(--radius-sm);
    color: var(--muted);
    background: transparent;
    cursor: pointer;
    font-size: 13px;
    font-weight: 800;
}

.login-tab.is-active {
    color: #06111f;
    background: var(--brand-gradient);
}

.login-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
}

.login-field label {
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
}

.login-field input {
    width: 100%;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    padding: 0 12px;
    outline: none;
    transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.secret-input {
    position: relative;
    display: block;
    width: 100%;
    height: 42px;
}

.secret-input input {
    display: block;
    width: 100%;
    height: 42px;
    padding-right: 48px;
}

.secret-toggle {
    appearance: none;
    -webkit-appearance: none;
    position: absolute;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    padding: 0;
    margin: 0;
    line-height: 1;
    font-size: 0;
    overflow: hidden;
    transition: color 180ms ease, background 180ms ease;
}

.secret-toggle:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.12);
}

.secret-toggle:focus-visible {
    outline: 2px solid rgba(56, 213, 255, 0.6);
    outline-offset: 2px;
}

.secret-toggle svg {
    width: 18px;
    height: 18px;
    display: block;
    flex: 0 0 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.login-field input:focus {
    border-color: var(--cyan);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 2px rgba(56, 213, 255, 0.18);
}

.login-button {
    width: 100%;
    height: 42px;
    border: 0;
    border-radius: var(--radius-sm);
    background: var(--brand-gradient);
    color: #06111f;
    cursor: pointer;
    font-size: 14px;
    font-weight: 800;
    transition: transform 180ms ease, box-shadow 180ms ease;
    box-shadow: 0 16px 44px rgba(56, 213, 255, 0.2);
}

.login-button:hover {
    transform: translateY(-1px);
}

.login-button:disabled {
    cursor: default;
    opacity: 0.65;
    transform: none;
}

#login-error {
    min-height: 20px;
    margin-top: 10px;
    color: var(--coral);
    font-size: 13px;
    text-align: center;
}

@media (max-width: 768px) {
    .login-card {
        width: 100%;
        max-width: 420px;
    }
}