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

:root {
    --green-dark: #0a3d2e;
    --green-mid: #145c42;
    --green-accent: #1d9e75;
    --green-light: #5dcaa5;
    --gold: #e6b84a;
    --gold-light: #f5d98a;
    --white: #ffffff;
    --gray-100: #f4f6f4;
    --gray-300: #c8d4cb;
    --gray-500: #7a8f80;
    --gray-700: #3a4a3f;
    --danger: #c0392b;
    --danger-light: #fff0f0;
    --warning: #92400e;
    --warning-bg: #fffbeb;
    --warning-brd: #fcd34d;
}

body {
    font-family: 'Sarabun', sans-serif;
    min-height: 100vh;
    background: var(--green-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(29, 158, 117, .18) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(20, 92, 66, .30) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(230, 184, 74, .04) 0%, transparent 70%);
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: repeating-linear-gradient(45deg, transparent, transparent 40px,
            rgba(29, 158, 117, .03) 40px, rgba(29, 158, 117, .03) 41px);
    pointer-events: none;
}

/* Particles */
.particle {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    animation: floatUp linear infinite;
}

@keyframes floatUp {
    from {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: .15;
    }

    90% {
        opacity: .15;
    }

    to {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

.login-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

.login-card {
    background: rgba(255, 255, 255, .97);
    border-radius: 20px;
    padding: 48px 40px 40px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .4), 0 0 0 1px rgba(29, 158, 117, .15);
    animation: slideUp .5s cubic-bezier(.22, 1, .36, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Logo */
.logo-area {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.logo-icon svg {
    width: 38px;
    height: 38px;
}

.logo-title {
    font-family: 'Noto Serif Thai', serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--green-dark);
    line-height: 1.4;
}

.logo-sub {
    font-size: .8rem;
    color: var(--gray-500);
    margin-top: 4px;
}

.divider {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--green-accent), var(--gold));
    border-radius: 2px;
    margin: 16px auto 28px;
}

.form-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-700);
    margin-bottom: 20px;
    text-align: center;
}

/* Alerts */
.alert {
    display: none;
    border-radius: 10px;
    padding: 12px 16px;
    font-size: .85rem;
    margin-bottom: 16px;
    text-align: center;
    line-height: 1.5;
}

.alert.show {
    display: block;
}

.alert-error {
    background: var(--danger-light);
    border: 1px solid #f5c6c6;
    color: var(--danger);
}

.alert-lock {
    background: var(--warning-bg);
    border: 1px solid var(--warning-brd);
    color: var(--warning);
}

/* Attempt dots */
.attempt-indicator {
    display: none;
    justify-content: center;
    gap: 6px;
    margin-bottom: 14px;
}

.attempt-indicator.show {
    display: flex;
}

.attempt-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gray-300);
    transition: background .3s;
}

.attempt-dot.used {
    background: var(--danger);
}

/* Form */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.input-wrap {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--gray-500);
    pointer-events: none;
}

.form-input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    border: 1.5px solid var(--gray-300);
    border-radius: 10px;
    font-family: 'Sarabun', sans-serif;
    font-size: .95rem;
    color: var(--gray-700);
    background: var(--gray-100);
    transition: all .25s;
    outline: none;
}

.form-input:focus {
    border-color: var(--green-accent);
    background: white;
    box-shadow: 0 0 0 3px rgba(29, 158, 117, .12);
}

.form-input.error {
    border-color: var(--danger);
    background: #fff8f8;
}

.form-input:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.toggle-pwd {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    padding: 4px;
    display: flex;
    align-items: center;
}

.toggle-pwd:hover {
    color: var(--green-accent);
}

.field-error {
    display: none;
    font-size: .78rem;
    color: var(--danger);
    margin-top: 6px;
    padding-left: 4px;
}

.field-error.show {
    display: block;
}

/* Submit button */
.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--green-mid) 0%, var(--green-accent) 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-family: 'Sarabun', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .25s;
    margin-top: 8px;
    box-shadow: 0 4px 16px rgba(29, 158, 117, .35);
    letter-spacing: .02em;
}

.login-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--green-dark), var(--green-mid));
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(29, 158, 117, .45);
}

.login-btn:active:not(:disabled) {
    transform: translateY(0);
}

.login-btn:disabled {
    opacity: .65;
    cursor: not-allowed;
    transform: none;
}

.login-btn.locked {
    background: linear-gradient(135deg, #6b7280, #9ca3af);
}

/* Lock countdown */
#lock-countdown {
    text-align: center;
    margin-top: 12px;
    font-size: .82rem;
    color: var(--warning);
    display: none;
    font-weight: 600;
}

#lock-countdown.show {
    display: block;
}

#lock-seconds {
    font-size: 1.1rem;
    color: var(--danger);
    font-weight: 700;
}

.footer-note {
    text-align: center;
    margin-top: 22px;
    font-size: .78rem;
    color: var(--gray-500);
}

.footer-note a {
    color: var(--green-accent);
    text-decoration: none;
    font-weight: 600;
}

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

@media (max-width: 480px) {
    .login-card {
        padding: 36px 24px 32px;
    }
}