/* ============================================================
   auth.css — Login & Register Page Styles
   Money Tracker v5 — Apple-inspired design language
   ============================================================ */

/* ── Auth Container ───────────────────────────────────────── */

.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}

/* Decorative background */
.auth-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(
            ellipse 60% 50% at 20% 20%,
            rgba(0, 255, 136, 0.06) 0%,
            transparent 70%
        ),
        radial-gradient(
            ellipse 50% 40% at 80% 80%,
            rgba(0, 204, 106, 0.04) 0%,
            transparent 70%
        ),
        radial-gradient(
            ellipse 40% 30% at 50% 60%,
            rgba(34, 197, 94, 0.03) 0%,
            transparent 70%
        );
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] .auth-container::before,
.auth-container-dark::before {
    background:
        radial-gradient(
            ellipse 60% 50% at 20% 20%,
            rgba(0, 255, 136, 0.1) 0%,
            transparent 70%
        ),
        radial-gradient(
            ellipse 50% 40% at 80% 80%,
            rgba(0, 204, 106, 0.08) 0%,
            transparent 70%
        ),
        radial-gradient(
            ellipse 40% 30% at 50% 60%,
            rgba(34, 197, 94, 0.05) 0%,
            transparent 70%
        );
}

@media (prefers-color-scheme: dark) {
    [data-theme="system"] .auth-container::before {
        background:
            radial-gradient(
                ellipse 60% 50% at 20% 20%,
                rgba(0, 255, 136, 0.1) 0%,
                transparent 70%
            ),
            radial-gradient(
                ellipse 50% 40% at 80% 80%,
                rgba(0, 204, 106, 0.08) 0%,
                transparent 70%
            ),
            radial-gradient(
                ellipse 40% 30% at 50% 60%,
                rgba(34, 197, 94, 0.05) 0%,
                transparent 70%
            );
    }
}

/* ── Auth Card ────────────────────────────────────────────── */

.auth-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    padding: var(--space-10) var(--space-8);
    animation: authCardIn var(--duration-slow) var(--ease-out) both;
    transition: background-color var(--duration-base) var(--ease-out),
                border-color var(--duration-base) var(--ease-out);
}

@keyframes authCardIn {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ── Auth Logo ────────────────────────────────────────────── */

.auth-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-8);
}

.auth-logo-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-primary), #00cc6a);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-contrast);
    margin-bottom: var(--space-4);
    box-shadow: 0 4px 16px rgba(0, 255, 136, 0.3);
}

.auth-logo-icon svg,
.auth-logo-icon i {
    width: 28px;
    height: 28px;
}

.auth-logo-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.auth-logo-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

/* ── Auth Title (in-card heading) ─────────────────────────── */

.auth-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--space-2);
    letter-spacing: -0.01em;
}

.auth-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-8);
    line-height: var(--line-height-relaxed);
}

/* ── Auth Form ────────────────────────────────────────────── */

.auth-form {
    display: flex;
    flex-direction: column;
}

.auth-form .form-group {
    margin-bottom: var(--space-5);
}

.auth-form .form-input {
    background-color: var(--color-bg-secondary);
    border-color: transparent;
}

.auth-form .form-input:hover {
    border-color: var(--color-border-strong);
}

.auth-form .form-input:focus {
    background-color: var(--color-surface);
    border-color: var(--color-border-focus);
    box-shadow: var(--shadow-focus);
}

/* Password input with toggle */
.auth-password-wrapper {
    position: relative;
}

.auth-password-wrapper .form-input {
    padding-right: var(--space-12);
}

.auth-password-toggle {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--color-text-tertiary);
    transition: color var(--duration-fast) var(--ease-out),
                background-color var(--duration-fast) var(--ease-out);
}

.auth-password-toggle:hover {
    color: var(--color-text-primary);
    background-color: var(--color-surface-hover);
}

.auth-password-toggle svg,
.auth-password-toggle i {
    width: 18px;
    height: 18px;
}

/* Remember me + forgot password row */
.auth-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.auth-remember {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.auth-remember-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border-strong);
    border-radius: 5px;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out),
                border-color var(--duration-fast) var(--ease-out);
    position: relative;
}

.auth-remember-checkbox:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.auth-remember-checkbox:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: 2px solid #ffffff;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}

.auth-remember-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.auth-forgot {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    transition: opacity var(--duration-fast) var(--ease-out);
}

.auth-forgot:hover {
    opacity: 0.7;
}

/* Submit button */
.auth-submit {
    width: 100%;
    min-height: 52px;
    margin-top: var(--space-2);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-2xl);
    background: var(--color-primary);
    color: var(--color-primary-contrast);
    transition: background-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.auth-submit:hover {
    background-color: var(--color-primary-hover);
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0, 255, 136, 0.3);
}

.auth-submit:active {
    background-color: var(--color-primary-active);
    transform: scale(0.98);
}

.auth-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Loading state for submit */
.auth-submit-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.auth-submit-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: var(--radius-full);
    animation: authSpinner 0.6s linear infinite;
}

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

/* ── Auth Divider ─────────────────────────────────────────── */

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-6) 0;
}

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

.auth-divider-text {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

/* ── Auth Links ───────────────────────────────────────────── */

.auth-link {
    text-align: center;
    margin-top: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.auth-link a,
.auth-link-action {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    transition: opacity var(--duration-fast) var(--ease-out);
    cursor: pointer;
}

.auth-link a:hover,
.auth-link-action:hover {
    opacity: 0.7;
}

/* ── Auth Error Alert ─────────────────────────────────────── */

.auth-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    animation: authAlertIn var(--duration-fast) var(--ease-out) both;
}

@keyframes authAlertIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-alert-error {
    background-color: var(--color-expense-light);
    color: var(--color-expense);
    border: 1px solid var(--color-expense-subtle);
}

.auth-alert-success {
    background-color: var(--color-income-light);
    color: var(--color-income);
    border: 1px solid var(--color-income-subtle);
}

.auth-alert-info {
    background-color: var(--color-info-light);
    color: var(--color-info);
    border: 1px solid rgba(59, 130, 246, 0.15);
}

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

.auth-alert-icon svg,
.auth-alert-icon i {
    width: 18px;
    height: 18px;
}

.auth-alert-message {
    flex: 1;
}

/* ── Password Strength Indicator ──────────────────────────── */

.password-strength {
    margin-top: var(--space-2);
}

.password-strength-bar {
    display: flex;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
}

.password-strength-segment {
    flex: 1;
    height: 4px;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-secondary);
    transition: background-color var(--duration-fast) var(--ease-out);
}

.password-strength[data-strength="1"] .password-strength-segment:nth-child(1) {
    background-color: var(--color-expense);
}

.password-strength[data-strength="2"] .password-strength-segment:nth-child(-n+2) {
    background-color: var(--color-warning);
}

.password-strength[data-strength="3"] .password-strength-segment:nth-child(-n+3) {
    background-color: #eab308;
}

.password-strength[data-strength="4"] .password-strength-segment {
    background-color: var(--color-income);
}

.password-strength-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.password-strength[data-strength="1"] .password-strength-label {
    color: var(--color-expense);
}

.password-strength[data-strength="2"] .password-strength-label {
    color: var(--color-warning);
}

.password-strength[data-strength="3"] .password-strength-label {
    color: #eab308;
}

.password-strength[data-strength="4"] .password-strength-label {
    color: var(--color-income);
}

/* ── Auth Footer ──────────────────────────────────────────── */

.auth-footer {
    text-align: center;
    margin-top: var(--space-8);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.auth-footer a {
    color: var(--color-text-tertiary);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--duration-fast) var(--ease-out);
}

.auth-footer a:hover {
    color: var(--color-text-secondary);
}

/* ── Theme Toggle on Auth Page ────────────────────────────── */

.auth-theme-toggle {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 10;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: background-color var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
}

.auth-theme-toggle:hover {
    color: var(--color-text-primary);
    transform: scale(1.08);
}

.auth-theme-toggle:active {
    transform: scale(0.95);
}

.auth-theme-toggle svg,
.auth-theme-toggle i {
    width: 18px;
    height: 18px;
}

/* ── Credit Link ──────────────────────────────────────────── */

.auth-credit {
    position: absolute;
    bottom: var(--space-4);
    right: var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-decoration: none;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
    z-index: 1;
}

.auth-credit:hover {
    opacity: 1;
    color: var(--color-primary);
}

/* ── Responsive ───────────────────────────────────────────── */

@media (max-width: 480px) {
    .auth-container {
        padding: var(--space-4);
        align-items: center;
    }

    .auth-card {
        max-width: 100%;
        padding: var(--space-8) var(--space-5);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
    }

    .auth-logo-icon {
        width: 48px;
        height: 48px;
    }

    .auth-logo-icon svg,
    .auth-logo-icon i {
        width: 24px;
        height: 24px;
    }

    .auth-logo-title {
        font-size: var(--font-size-xl);
    }

    .auth-title {
        font-size: var(--font-size-lg);
    }

    .auth-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .auth-submit {
        min-height: 48px;
    }

    .auth-theme-toggle {
        top: var(--space-3);
        right: var(--space-3);
    }
}

/* ── Auth page background animation (subtle floating shapes) ── */

.auth-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.auth-bg-shape {
    position: absolute;
    border-radius: var(--radius-full);
    opacity: 0.04;
    animation: authBgFloat 20s ease-in-out infinite;
}

.auth-bg-shape:nth-child(1) {
    width: 300px;
    height: 300px;
    background: var(--color-primary);
    top: -100px;
    left: -50px;
    animation-delay: 0s;
}

.auth-bg-shape:nth-child(2) {
    width: 200px;
    height: 200px;
    background: #8b5cf6;
    bottom: -60px;
    right: -40px;
    animation-delay: -7s;
}

.auth-bg-shape:nth-child(3) {
    width: 150px;
    height: 150px;
    background: var(--color-income);
    top: 40%;
    right: 10%;
    animation-delay: -14s;
}

@keyframes authBgFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(20px, -20px) scale(1.05);
    }
    50% {
        transform: translate(-10px, 15px) scale(0.95);
    }
    75% {
        transform: translate(15px, 10px) scale(1.03);
    }
}

[data-theme="dark"] .auth-bg-shape {
    opacity: 0.06;
}

@media (prefers-color-scheme: dark) {
    [data-theme="system"] .auth-bg-shape {
        opacity: 0.06;
    }
}

/* ── Privacy Policy Page ─────────────────────────────────── */

.auth-card--wide {
    max-width: 640px;
}

.privacy-content {
    text-align: left;
    margin-top: var(--space-6);
}

.privacy-section {
    margin-bottom: var(--space-6);
}

.privacy-section h2 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.privacy-section p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-2);
}

.privacy-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.privacy-section li {
    position: relative;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    padding-left: var(--space-4);
    margin-bottom: var(--space-1);
}

.privacy-section li::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 10px;
    width: 5px;
    height: 5px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
}

.privacy-updated {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-align: center;
    margin-top: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

@media (max-width: 480px) {
    .auth-card--wide {
        max-width: 100%;
    }
}