/* Khurasan University MIS — Login page */
:root {
    --ku-primary: #1a3a5c;
    --ku-primary-dark: #0f2740;
    --ku-accent: #2b6cb0;
    --ku-accent-hover: #1e5590;
    --ku-surface: #ffffff;
    --ku-text: #1e293b;
    --ku-text-muted: #64748b;
    --ku-border: #e2e8f0;
    --ku-error-bg: #fef2f2;
    --ku-error-text: #b91c1c;
    --ku-error-border: #fecaca;
    --ku-radius: 12px;
    --ku-shadow: 0 20px 50px rgba(15, 39, 64, 0.18);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    color: var(--ku-text);
    background: var(--ku-primary-dark);
}

.ku-login-page {
    min-height: 100vh;
    display: flex;
    align-items: stretch;
}

/* Brand panel — left side on desktop */
.ku-login-brand {
    flex: 1;
    display: none;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 4rem;
    background: linear-gradient(145deg, var(--ku-primary-dark) 0%, var(--ku-primary) 45%, #234a73 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.ku-login-brand::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(43, 108, 176, 0.35) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.06) 0%, transparent 40%);
    pointer-events: none;
}

.ku-login-brand-inner {
    position: relative;
    z-index: 1;
    max-width: 420px;
}

.ku-login-logo {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

.ku-login-brand h1 {
    margin: 0 0 0.75rem;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.ku-login-brand p {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.82);
}

.ku-login-features {
    margin: 2.5rem 0 0;
    padding: 0;
    list-style: none;
}

.ku-login-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.88);
}

.ku-login-features li::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #60a5fa;
    flex-shrink: 0;
}

/* Form panel */
.ku-login-form-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    background: #f1f5f9;
}

.ku-login-card {
    width: 100%;
    max-width: 420px;
    background: var(--ku-surface);
    border-radius: var(--ku-radius);
    box-shadow: var(--ku-shadow);
    border: 1px solid var(--ku-border);
    overflow: hidden;
}

.ku-login-card-header {
    padding: 2rem 2rem 1.25rem;
    text-align: center;
    border-bottom: 1px solid var(--ku-border);
    background: linear-gradient(180deg, #fafbfc 0%, #fff 100%);
}

.ku-login-card-header .ku-mobile-logo {
    display: inline-flex;
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--ku-primary);
    color: #fff;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.ku-login-card-header h2 {
    margin: 0 0 0.35rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--ku-primary);
}

.ku-login-card-header p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--ku-text-muted);
}

.ku-login-card-body {
    padding: 1.75rem 2rem 2rem;
}

.ku-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    padding: 0.85rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    line-height: 1.45;
    margin-bottom: 1.25rem;
    background: var(--ku-error-bg);
    color: var(--ku-error-text);
    border: 1px solid var(--ku-error-border);
}

.ku-alert-icon {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 1px;
}

.ku-field {
    margin-bottom: 1.15rem;
}

.ku-field label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ku-text);
}

.ku-field label .required {
    color: #dc2626;
    margin-left: 2px;
}

.ku-input-wrap {
    position: relative;
}

.ku-input-wrap svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--ku-text-muted);
    pointer-events: none;
}

.ku-input-wrap input {
    width: 100%;
    height: 46px;
    padding: 0 14px 0 42px;
    border: 1px solid var(--ku-border);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--ku-text);
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.ku-input-wrap input:focus {
    outline: none;
    border-color: var(--ku-accent);
    box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.15);
}

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

/* Honeypot — hidden from humans */
.ku-honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

/* Captcha row */
.ku-captcha-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ku-text);
}

.ku-captcha-row {
    display: flex;
    gap: 0.65rem;
    align-items: stretch;
}

.ku-captcha-image-wrap {
    flex-shrink: 0;
    border: 1px solid var(--ku-border);
    border-radius: 8px;
    overflow: hidden;
    background: #eef2f7;
    line-height: 0;
}

.ku-captcha-image-wrap img {
    display: block;
    width: 175px;
    height: 44px;
}

.ku-captcha-refresh {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    align-self: center;
    border: 1px solid var(--ku-border);
    border-radius: 8px;
    background: #f8fafc;
    color: var(--ku-accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, border-color 0.15s;
}

.ku-captcha-refresh:hover {
    background: #eef2f7;
    border-color: #cbd5e1;
}

.ku-captcha-refresh svg {
    width: 20px;
    height: 20px;
}

.ku-captcha-input {
    flex: 1;
    min-width: 0;
}

.ku-captcha-input input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--ku-border);
    border-radius: 8px;
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 600;
    text-align: center;
}

.ku-captcha-input input:focus {
    outline: none;
    border-color: var(--ku-accent);
    box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.15);
}

.ku-captcha-hint {
    margin: 0.4rem 0 0;
    font-size: 0.78rem;
    color: var(--ku-text-muted);
}

.ku-btn-login {
    width: 100%;
    height: 48px;
    margin-top: 0.5rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(180deg, var(--ku-accent) 0%, var(--ku-accent-hover) 100%);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.15s;
    box-shadow: 0 4px 14px rgba(43, 108, 176, 0.35);
}

.ku-btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(43, 108, 176, 0.4);
}

.ku-btn-login.is-loading {
    opacity: 0.85;
    pointer-events: none;
    cursor: wait;
}

.ku-login-footer {
    margin-top: 1.25rem;
    text-align: center;
    font-size: 0.875rem;
}

.ku-login-footer a {
    color: var(--ku-accent);
    text-decoration: none;
    font-weight: 500;
}

.ku-login-footer a:hover {
    text-decoration: underline;
}

.ku-login-copyright {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.78rem;
    color: var(--ku-text-muted);
}

/* Desktop split layout */
@media (min-width: 900px) {
    .ku-login-brand {
        display: flex;
        max-width: 48%;
    }

    .ku-login-form-panel {
        max-width: 52%;
    }

    .ku-login-card-header .ku-mobile-logo {
        display: none;
    }
}

@media (max-width: 480px) {
    .ku-login-card-body {
        padding: 1.5rem 1.25rem 1.75rem;
    }

    .ku-login-card-header {
        padding: 1.5rem 1.25rem 1rem;
    }

    .ku-captcha-row {
        flex-wrap: wrap;
    }

    .ku-captcha-image-wrap img {
        width: 155px;
        height: 38px;
    }

    .ku-captcha-input {
        flex: 1 1 100%;
    }
}