/* ============================================
   LOGIN PAGE STYLES
   ShopNow E-commerce Platform
   ============================================ */

/* Import base variables */
:root {
    /* Colors - Monochrome Palette */
    --color-white: #FFFFFF;
    --color-off-white: #FAFAFA;
    --color-light-gray: #F5F5F5;
    --color-gray-100: #E8E8E8;
    --color-gray-200: #E0E0E0;
    --color-gray-300: #CCCCCC;
    --color-gray-400: #999999;
    --color-gray-500: #777777;
    --color-gray-600: #666666;
    --color-gray-700: #444444;
    --color-gray-800: #333333;
    --color-dark-gray: #1A1A1A;
    --color-black: #000000;

    /* Semantic Colors */
    --bg-primary: var(--color-white);
    --bg-secondary: var(--color-light-gray);
    --bg-card: var(--color-off-white);
    --bg-hover: var(--color-gray-100);

    --text-primary: var(--color-dark-gray);
    --text-secondary: var(--color-gray-600);
    --text-muted: var(--color-gray-400);
    --text-inverse: var(--color-white);

    --accent: var(--color-black);
    --accent-hover: var(--color-gray-800);

    --border-color: var(--color-gray-200);
    --border-dark: var(--color-gray-300);

    --success: #22c55e;
    --danger: #ef4444;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', var(--font-primary);

    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--text-primary);
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   LOGIN PAGE LAYOUT
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 50%, #1a1a1a 100%);
    position: relative;
    overflow: hidden;
}

/* Animated background pattern */
.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.02) 0%, transparent 30%);
    animation: floatBackground 20s ease-in-out infinite;
}

@keyframes floatBackground {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(2%, 2%) rotate(1deg);
    }

    50% {
        transform: translate(0, 4%) rotate(0deg);
    }

    75% {
        transform: translate(-2%, 2%) rotate(-1deg);
    }
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
}

/* Back to Store Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-gray-400);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-lg);
    transition: color var(--transition-fast);
}

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

.back-link svg {
    width: 18px;
    height: 18px;
}

/* Login Card */
.login-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
}

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

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

/* Login Header */
.login-header {
    padding: var(--space-2xl) var(--space-2xl) var(--space-xl);
    text-align: center;
}

.login-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.login-logo-icon {
    width: 44px;
    height: 44px;
    background: var(--accent);
    color: var(--text-inverse);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: var(--fs-lg);
}

.login-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.login-subtitle {
    font-size: var(--fs-sm);
    color: var(--text-secondary);
}

/* Admin Badge */
.admin-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--accent);
    color: var(--text-inverse);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: var(--space-md);
}

.admin-badge svg {
    width: 14px;
    height: 14px;
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    padding: 0 var(--space-2xl);
    gap: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: var(--space-md) 0;
    font-weight: 500;
    color: var(--text-muted);
    text-align: center;
    position: relative;
    transition: color var(--transition-fast);
}

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

.auth-tab.active {
    color: var(--text-primary);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
}

/* Form Container */
.form-panel {
    display: none;
    padding: var(--space-xl) var(--space-2xl) var(--space-2xl);
}

.form-panel.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Form Groups */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.form-input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--fs-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

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

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

/* Password Toggle */
.password-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    padding: var(--space-xs);
    transition: color var(--transition-fast);
}

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

.password-toggle svg {
    width: 20px;
    height: 20px;
}

/* Form Options Row */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    font-size: var(--fs-sm);
}

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

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

.forgot-link {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    background: var(--accent);
    color: var(--text-inverse);
    font-size: var(--fs-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.submit-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.submit-btn:disabled {
    background: var(--color-gray-400);
    cursor: not-allowed;
    transform: none;
}

.submit-btn .loading {
    display: none;
}

.submit-btn.loading .btn-text {
    visibility: hidden;
}

.submit-btn.loading .loading {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: var(--text-inverse);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

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

/* Social Buttons */
.social-btns {
    display: flex;
    gap: var(--space-md);
}

.social-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.social-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-dark);
}

.social-btn svg {
    width: 20px;
    height: 20px;
}

/* Error Message */
.error-message {
    background: #fef2f2;
    color: var(--danger);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-lg);
    display: none;
    align-items: center;
    gap: var(--space-sm);
}

.error-message.visible {
    display: flex;
}

.error-message svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Success Message */
.success-message {
    background: #f0fdf4;
    color: var(--success);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-lg);
    display: none;
    align-items: center;
    gap: var(--space-sm);
}

.success-message.visible {
    display: flex;
}

/* Footer Links */
.login-footer {
    padding: var(--space-lg) var(--space-2xl);
    background: var(--bg-secondary);
    text-align: center;
    font-size: var(--fs-sm);
    color: var(--text-secondary);
}

.login-footer a {
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* Admin Login Specific */
.login-page.admin-login {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 480px) {
    .login-page {
        padding: var(--space-md);
        align-items: flex-start;
        padding-top: var(--space-2xl);
    }

    .login-header {
        padding: var(--space-xl) var(--space-lg) var(--space-md);
    }

    .auth-tabs {
        padding: 0 var(--space-lg);
    }

    .form-panel {
        padding: var(--space-lg);
    }

    .login-footer {
        padding: var(--space-md) var(--space-lg);
    }

    .social-btns {
        flex-direction: column;
    }
}