:root {
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --color-text: #1a1a1a;
    --color-subtext: #666;
    --color-accent: #000;
    --color-bg: #fff;
    --color-light-bg: #f8f8f8;
    --color-border: #e0e0e0;
    --color-error: #d32f2f;
    --color-error-bg: #fef2f2;
    --color-success: #166534;
    --color-success-bg: #f0fdf4;
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-light-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    position: relative;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    width: 100%;
    max-width: 420px;
    padding: 48px 40px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    max-height: 90vh;
    overflow-y: auto;
}

/* ── Close button ────────────────────── */
.login-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    cursor: pointer;
    color: var(--color-subtext);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.login-close-btn:hover {
    background: var(--color-light-bg);
    color: var(--color-text);
    border-color: var(--color-text);
}

.login-close-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

.login-title {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.newsletter-optin {
    margin-top: 8px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--color-subtext);
    cursor: pointer;
}

.checkbox-label input {
    margin-top: 4px;
    flex-shrink: 0;
}

.login-subtitle {
    font-size: 14px;
    color: var(--color-subtext);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ── Auth Tabs ──────────────────────────── */
.auth-tabs {
    display: flex;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 28px;
}

.auth-tab {
    flex: 1;
    padding: 10px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-body);
    background: var(--color-light-bg);
    border: none;
    cursor: pointer;
    color: var(--color-subtext);
    transition: all 0.2s ease;
    letter-spacing: 0.01em;
}

.auth-tab:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

.auth-tab.active {
    background: var(--color-accent);
    color: var(--color-bg);
}

.auth-tab:not(.active):hover {
    background: #eee;
}

/* ── Hidden attribute override ────────── */
.login-success[hidden],
.login-error[hidden] { display: none !important; }

/* ── Success message ───────────────────── */
.login-success {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--color-success-bg);
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    color: var(--color-success);
    font-size: 13px;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 6px;
    letter-spacing: 0.01em;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: var(--font-body);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

.form-group input.input-error {
    border-color: var(--color-error);
}

.form-group input.input-error:focus {
    box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.1);
}

.form-group input::placeholder {
    color: #bbb;
}

/* ── Inline field hints ──────────────── */
.field-hint {
    display: block;
    font-size: 12px;
    margin-top: 4px;
    min-height: 16px;
}

.field-hint.hint-error {
    color: var(--color-error);
}

.field-hint.hint-ok {
    color: var(--color-success);
}

/* ── Password requirements ───────────── */
.password-requirements {
    margin-bottom: 20px;
    padding: 12px 16px;
    background: var(--color-light-bg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    padding: 0 16px;
    margin-bottom: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease, margin 0.3s ease;
}

.password-requirements.visible {
    max-height: 200px;
    opacity: 1;
    padding: 12px 16px;
    margin-bottom: 20px;
}

.password-requirements .req-title {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-subtext);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.password-requirements .req-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 12px;
}

.password-requirements .req-list li {
    font-size: 12px;
    color: var(--color-subtext);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s;
}

.password-requirements .req-list li .req-icon {
    font-size: 8px;
    flex-shrink: 0;
}

.password-requirements .req-list li.valid {
    color: var(--color-success);
}

.password-wrapper {
    position: relative;
}

.password-wrapper input {
    padding-right: 44px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-subtext);
    padding: 4px;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

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

.toggle-password:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

.login-error {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 16px;
    background: var(--color-error-bg);
    border: 1px solid #fecaca;
    border-radius: 8px;
    color: var(--color-error);
    line-height: 1.5;
}

.login-error.login-warning {
    background: #fffbe6;
    border-color: #e6d27a;
    color: #6b5900;
    font-size: 13px;
    margin-bottom: 20px;
}

.login-inline-link {
    color: inherit;
    font-size: 13px;
    text-decoration: underline;
}

.login-inline-link:hover {
    opacity: 0.85;
}

.login-error:not(.login-warning) {
    font-size: 13px;
    margin-bottom: 20px;
    animation: shakeError 0.4s ease;
}

@keyframes shakeError {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.login-btn {
    width: 100%;
    padding: 14px;
    font-size: 15px;
    font-weight: 500;
    font-family: var(--font-body);
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: 0.02em;
}

.login-btn:hover:not(:disabled) {
    opacity: 0.85;
    transform: translateY(-1px);
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.spinner {
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

.login-footer {
    margin-top: 28px;
    text-align: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-subtext);
    text-decoration: none;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--color-text);
}

.back-link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

@media (max-width: 480px) {
    .login-card {
        padding: 36px 20px;
        border-radius: 0;
        border: none;
        box-shadow: none;
        max-width: 100%;
        max-height: 100vh;
    }

    .login-close-btn {
        top: 12px;
        right: 12px;
    }

    .login-title {
        font-size: 24px;
    }

    .password-requirements .req-list {
        grid-template-columns: 1fr;
    }
}