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

:root {
    --color-primary: #000000;
    --color-accent: #FFD700;
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-600: #666666;
    --color-gray-800: #212529;
    --color-green: #10b981;
    --color-red: #dc2626;
    --color-blue: #3b82f6;
    --color-yellow-light: #fef3c7;
    --color-yellow-border: #fde047;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: white;
    color: var(--color-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.container {
    width: 100%;
    max-width: 480px;
}

.logo {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-box {
    display: inline-block;
    background-color: var(--color-accent);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    letter-spacing: 0.5px;
}

.card {
    background-color: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.card-header {
    padding: 2rem 2rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--color-gray-200);
}

.card-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.card-description {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

.card-content {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-primary);
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 0.5rem;
    background-color: var(--color-white);
    font-size: 1rem;
    transition: all 0.2s;
    font-family: inherit;
}

    .form-input:focus {
        outline: none;
        border-color: var(--color-accent);
        box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
    }

    .form-input::placeholder {
        color: var(--color-gray-400);
    }

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    pointer-events: none;
}

.input-wrapper .form-input {
    padding-left: 2.75rem;
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-gray-600);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

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

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.checkbox-input {
    width: 18px;
    height: 18px;
    margin-top: 0.125rem;
    cursor: pointer;
    flex-shrink: 0;
}

.checkbox-label {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    cursor: pointer;
    line-height: 1.5;
}

    .checkbox-label a {
        color: var(--color-primary);
        text-decoration: underline;
        font-weight: 500;
    }

        .checkbox-label a:hover {
            color: var(--color-accent);
        }

.btn {
    padding: 0.875rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s;
    font-size: 1rem;
    width: 100%;
    font-family: inherit;
}

.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

    .btn-accent:hover {
        background-color: #e6c200;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
    }

    .btn-accent:active {
        transform: translateY(0);
    }

    .btn-accent:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none;
    }

.divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

    .divider::before,
    .divider::after {
        content: '';
        flex: 1;
        height: 1px;
        background-color: var(--color-gray-300);
    }

.divider-text {
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

.card-footer {
    padding: 1.5rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid var(--color-gray-200);
    background-color: var(--color-gray-50);
}

.footer-text {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

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

        .footer-text a:hover {
            color: var(--color-accent);
            text-decoration: underline;
        }

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    display: none;
    align-items: flex-start;
    gap: 0.75rem;
}

    .alert.show {
        display: flex;
    }

.alert-error {
    background-color: #fee;
    border: 1px solid #fcc;
    color: #c00;
}

.alert-success {
    background-color: #efe;
    border: 1px solid #cfc;
    color: #060;
}

.alert-icon {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.alert-message {
    font-size: 0.875rem;
}

.icon {
    width: 20px;
    height: 20px;
    display: inline-block;
    vertical-align: middle;
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.password-strength {
    margin-top: 0.5rem;
    display: none;
}

    .password-strength.show {
        display: block;
    }

.strength-bar {
    height: 4px;
    background-color: var(--color-gray-200);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.strength-bar-fill {
    height: 100%;
    transition: width 0.3s, background-color 0.3s;
    width: 0%;
    background-color: var(--color-gray-400);
}

    .strength-bar-fill.weak {
        width: 33%;
        background-color: var(--color-red);
    }

    .strength-bar-fill.medium {
        width: 66%;
        background-color: #f59e0b;
    }

    .strength-bar-fill.strong {
        width: 100%;
        background-color: var(--color-green);
    }

.strength-text {
    font-size: 0.75rem;
    color: var(--color-gray-600);
}

.requirements-list {
    list-style: none;
    margin-top: 0.75rem;
    padding: 0;
}

.requirement-item {
    font-size: 0.75rem;
    color: var(--color-gray-600);
    padding: 0.25rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

    .requirement-item.met {
        color: var(--color-green);
    }

    .requirement-item .icon {
        width: 14px;
        height: 14px;
    }

@media (max-width: 640px) {
    body {
        padding: 1rem;
    }

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

    .card-content {
        padding: 1.5rem;
    }

    .card-footer {
        padding: 1rem 1.5rem 1.5rem;
    }

    .card-title {
        font-size: 1.5rem;
    }
}

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.hidden {
    display: none !important;
}