/* Common CSS - Shared styles, variables, and utilities */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --dark: #0f172a;
    --dark-lighter: #1e293b;
    --light: #f8fafc;
    --light-gray: #f1f5f9;
    --border: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;

    /* Aliases & additional */
    --primary-color: #4f46e5;
    --border-color: #e2e8f0;
    --dark-gray: #1e293b;
    --card-bg: #ffffff;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.04);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Fonts */
    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Outfit', var(--font-base);
}

/* Dark Mode Colors */
/* Dark Mode Variables */
body.dark-mode,
[data-theme='dark'] {
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --dark: #f8fafc;
    --dark-lighter: #f1f5f9;
    --light: #0f172a;
    --light-gray: #1e293b;
    --border: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;

    --primary-color: #818cf8;
    --border-color: #334155;
    --dark-gray: #0f172a;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --text-light: #94a3b8;
    --input-bg: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s ease;
    margin-right: 12px;
}

.theme-toggle:hover {
    background-color: var(--bg-color);
    transform: translateY(-1px);
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

/* Body */
body {
    font-family: var(--font-base);
    background: var(--light);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background var(--transition-base), color var(--transition-base);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

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

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

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

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

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

.btn-secondary:hover {
    background: var(--border);
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 14px;
}

/* Input Fields */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

.input-group input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    background: var(--light);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-group input::placeholder {
    color: var(--text-secondary);
}

.input-group .error-message {
    color: var(--error);
    font-size: 13px;
    margin-top: var(--spacing-xs);
    display: none;
}

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

.input-group.error .error-message {
    display: block;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

body.dark-mode .card {
    background: var(--light-gray);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    color: white;
    font-weight: 500;
    box-shadow: var(--shadow-xl);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 1000;
    max-width: 350px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-info {
    background: var(--primary);
}

.toast-success {
    background: var(--success);
}

.toast-error {
    background: var(--error);
}

.toast-warning {
    background: var(--warning);
}

/* Loader Overlay */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity var(--transition-base);
    backdrop-filter: blur(4px);
}

.loader-overlay.show {
    opacity: 1;
}

.loader-content {
    text-align: center;
    color: white;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

/* Confirm Modal */
.confirm-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.confirm-modal.show {
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

body.dark-mode .modal-content {
    background: var(--light-gray);
}

.confirm-modal.show .modal-content {
    transform: scale(1);
}

.modal-message {
    font-size: 16px;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.modal-buttons .btn {
    flex: 1;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 45px;
    height: 45px;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: white;
    border: none;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

/* Responsive */
@media (max-width: 640px) {
    :root {
        --spacing-lg: 20px;
        --spacing-xl: 28px;
        --spacing-2xl: 36px;
    }

    .toast {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }

    .dark-mode-toggle {
        top: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

/* ============================================
   TIER 1 + TIER 2: UI/UX Enhancements
   ============================================ */

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #e5e7eb 25%, #f3f4f6 50%, #e5e7eb 75%) !important;
    background-size: 200% 100% !important;
    animation: shimmer 1.5s ease-in-out infinite !important;
    border-radius: 6px;
    color: transparent !important;
    pointer-events: none;
    user-select: none;
    border: none !important;
    box-shadow: none !important;
    min-height: 1em;
}

body.dark-mode .skeleton {
    background: linear-gradient(90deg, #1f2937 25%, #374151 50%, #1f2937 75%) !important;
    background-size: 200% 100% !important;
}

.skeleton * {
    visibility: hidden;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 18px;
    width: 60%;
    margin-bottom: 8px;
    border-radius: 4px;
}

.skeleton-large {
    height: 38px;
    width: 45%;
    border-radius: 6px;
}

/* Glassmorphism */
.glass {
    background: rgba(255, 255, 255, 0.65) !important;
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.25) !important;
}

body.dark-mode .glass {
    background: rgba(31, 41, 55, 0.6) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
}

/* Offline Banner */
.offline-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    text-align: center;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 600;
    z-index: 10000;
    transform: translateY(-100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.3px;
}

.offline-banner.show {
    transform: translateY(0);
}

/* Pull-to-Refresh Indicator */
.pull-indicator {
    position: fixed;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    z-index: 9998;
    opacity: 0;
    transition: top 0.3s ease, opacity 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.pull-indicator.visible {
    opacity: 1;
}

.pull-indicator.refreshing {
    top: 20px;
    opacity: 1;
}

/* Enhanced Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 56px;
    margin-bottom: var(--spacing-md);
    animation: emptyBounce 2s ease-in-out infinite;
}

@keyframes emptyBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.empty-state-text {
    font-size: 14px;
    margin-bottom: var(--spacing-lg);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

/* Error State */
.error-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    color: var(--text-secondary);
}

.error-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.error-state-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--error);
    margin-bottom: var(--spacing-xs);
}

.error-state-text {
    font-size: 14px;
    margin-bottom: var(--spacing-lg);
}

.error-state .btn {
    margin: 0 auto;
}

/* Swipe Account Card */
.account-card {
    transition: transform 0.3s ease, opacity 0.3s ease, box-shadow 0.3s ease;
    touch-action: pan-y;
}

.account-card.swiping {
    transition: none;
}

.account-card.swiped-out {
    transform: translateX(-110%) !important;
    opacity: 0;
}

/* Keyboard Shortcut Hint */
.shortcut-hint {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--dark);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    z-index: 9000;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    box-shadow: var(--shadow-xl);
}

body.dark-mode .shortcut-hint {
    background: #f9fafb;
    color: #111827;
}

.shortcut-hint.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.shortcut-hint kbd {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-base);
    margin: 0 2px;
}

body.dark-mode .shortcut-hint kbd {
    background: rgba(0, 0, 0, 0.15);
}

.hidden {
    display: none !important;
}