/**
 * Auth Styles - Stamping.io
 * Custom styles with dark/light mode support
 */

/* CSS Variables for theming */
:root {
    --color-primary: #000000;
    --color-primary-hover: #1a1a1a;
    --color-secondary: #ffffff;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    
    /* Light mode (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #9ca3af;
    --border-color: #d1d5db;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
    --input-bg: #ffffff;
}

/* Dark mode */
[data-theme="dark"] {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #262626;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --card-bg: #1a1a1a;
    --input-bg: #262626;
}

/* System preference detection */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #0f0f0f;
        --bg-secondary: #1a1a1a;
        --bg-tertiary: #262626;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-tertiary: #9ca3af;
        --border-color: #374151;
        --shadow-color: rgba(0, 0, 0, 0.3);
        --card-bg: #1a1a1a;
        --input-bg: #262626;
    }
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.auth-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

@media (min-width: 1024px) {
    .auth-container {
        flex-direction: row;
    }
}

/* Form Panel */
.auth-form-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    background-color: var(--bg-primary);
}

@media (min-width: 640px) {
    .auth-form-panel {
        padding: 3rem;
    }
}

@media (min-width: 1024px) {
    .auth-form-panel {
        flex: 0 0 45%;
        max-width: 45%;
        padding: 4rem;
    }
}

/* Brand Panel */
.auth-brand-panel {
    display: none;
    background-color: var(--color-primary);
    color: var(--color-secondary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem;
    position: relative;
    overflow: hidden;
}

@media (min-width: 1024px) {
    .auth-brand-panel {
        display: flex;
        flex: 0 0 55%;
        max-width: 55%;
    }
}

[data-theme="dark"] .auth-brand-panel {
    background-color: #1a1a1a;
    border-left: 1px solid var(--border-color);
}

/* Brand background pattern */
.auth-brand-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.auth-brand-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 500px;
}

.auth-brand-logo {
    max-width: 280px;
    margin-bottom: 2rem;
    filter: brightness(0) invert(1);
}

[data-theme="dark"] .auth-brand-logo {
    filter: brightness(0) invert(1);
}

.auth-brand-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.auth-brand-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.auth-brand-stats {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    font-weight: 600;
}

/* Form Container */
.auth-form-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

/* Header controls */
.auth-header-controls {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 50;
}

@media (min-width: 1024px) {
    .auth-header-controls {
        position: absolute;
    }
}

/* Back button */
.auth-back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    margin-bottom: 2rem;
    transition: color 0.2s ease;
}

.auth-back-button:hover {
    color: var(--text-primary);
}

/* Form header */
.auth-form-header {
    margin-bottom: 2rem;
}

.auth-form-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.auth-form-subtitle {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* Form group */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-label-required::after {
    content: ' *';
    color: var(--color-error);
}

/* Input wrapper for icons */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 0.875rem;
    color: var(--text-tertiary);
    pointer-events: none;
    transition: color 0.2s ease;
}

.input-wrapper:focus-within .input-icon {
    color: var(--color-accent);
}

/* Form input */
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.75rem;
    font-size: 0.9375rem;
    color: var(--text-primary);
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Password toggle button */
.password-toggle {
    position: absolute;
    right: 0.875rem;
    padding: 0.25rem;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color 0.2s ease;
}

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

/* Error message */
.form-error {
    font-size: 0.8125rem;
    color: var(--color-error);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Checkbox */
.form-checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.form-checkbox {
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.125rem;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-checkbox-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-checkbox-label a {
    color: var(--color-accent);
    text-decoration: none;
}

.form-checkbox-label a:hover {
    text-decoration: underline;
}

/* Submit button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

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

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

[data-theme="dark"] .btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-primary);
}

[data-theme="dark"] .btn-primary:hover:not(:disabled) {
    background-color: #e5e5e5;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-secondary);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
    padding: 0.5rem;
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.btn-full {
    width: 100%;
}

/* Spinner */
.spinner {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Links row */
.auth-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
    text-align: center;
}

.auth-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-link a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.auth-link a:hover {
    text-decoration: underline;
}

/* Divider */
.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}

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

/* Icon button */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Language selector */
.lang-selector {
    position: relative;
}

.lang-selector-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-selector-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 120px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px var(--shadow-color);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: all 0.2s ease;
    z-index: 100;
}

.lang-selector:hover .lang-dropdown,
.lang-dropdown:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: 0.625rem 1rem;
    text-align: left;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.lang-option:first-child {
    border-radius: 0.5rem 0.5rem 0 0;
}

.lang-option:last-child {
    border-radius: 0 0 0.5rem 0.5rem;
}

.lang-option:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.lang-option.active {
    color: var(--color-accent);
    font-weight: 500;
}

/* Password strength indicator */
.password-strength {
    margin-top: 0.5rem;
}

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

.password-strength-fill {
    height: 100%;
    width: 0%;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.password-strength-fill.weak {
    width: 25%;
    background-color: var(--color-error);
}

.password-strength-fill.fair {
    width: 50%;
    background-color: var(--color-warning);
}

.password-strength-fill.good {
    width: 75%;
    background-color: var(--color-info);
}

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

.password-requirements {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.25rem 1rem;
    font-size: 0.75rem;
}

.password-requirement {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--text-tertiary);
}

.password-requirement.valid {
    color: var(--color-success);
}

.password-requirement svg {
    width: 0.875rem;
    height: 0.875rem;
    flex-shrink: 0;
}

/* Toast notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 1000;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px var(--shadow-color);
    max-width: 360px;
    pointer-events: auto;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(1rem);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.removing {
    animation: slideOut 0.3s ease forwards;
}

@keyframes slideOut {
    to {
        opacity: 0;
        transform: translateX(1rem);
    }
}

.toast-icon {
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
}

.toast-icon.success {
    color: var(--color-success);
}

.toast-icon.error {
    color: var(--color-error);
}

.toast-icon.warning {
    color: var(--color-warning);
}

.toast-icon.info {
    color: var(--color-info);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.toast-close {
    flex-shrink: 0;
    padding: 0.25rem;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color 0.2s ease;
}

.toast-close:hover {
    color: var(--text-primary);
}

/* Footer */
.auth-footer {
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-color);
}

.auth-footer a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

/* Mobile logo */
.auth-mobile-logo {
    display: block;
    margin-bottom: 2rem;
}

@media (min-width: 1024px) {
    .auth-mobile-logo {
        display: none;
    }
}

.auth-mobile-logo img {
    height: 32px;
}

[data-theme="dark"] .auth-mobile-logo img {
    filter: brightness(0) invert(1);
}

/* Utility classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Terms page specific */
.terms-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.terms-header {
    text-align: center;
    margin-bottom: 3rem;
}

.terms-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
}

.terms-content h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.terms-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.terms-content ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.terms-content li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}

/* Print styles */
@media print {
    .auth-brand-panel,
    .auth-header-controls,
    .toast-container {
        display: none !important;
    }
    
    .auth-form-panel {
        max-width: 100%;
    }
}