/* ========== Base Styles ========== */

/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary-color: #2196F3;
    --primary-hover: #1976D2;
    --primary-dark: #1565C0;
    --secondary-color: #6366F1;
    --secondary-hover: #4F46E5;
    --accent-color: #DC2626;
    --accent-hover: #B91C1C;
    --success-color: #059669;
    --success-hover: #047857;
    --dark-color: #1E293B;
    --dark-hover: #0F172A;
    --light-bg: #FFFFFF;
    --light-secondary: #F8FAFC;
    --light-tertiary: #F1F5F9;
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --border-color: #E2E8F0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-primary: rgba(33, 150, 243, 0.2);
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border */
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --border-width: 1px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    /* Layout */
    --container-max-width: 1440px;
    
    /* Z-index */
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;
}

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

/* ===== HTML & Body ===== */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--light-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Vue v-cloak - Hide elements before Vue is loaded */
[v-cloak] {
    display: none !important;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* ===== Links ===== */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

a:focus {
    outline: none;
}

/* ===== Lists ===== */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* ===== Images ===== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== Form Elements ===== */
input,
textarea,
select,
button {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
}

button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== Button Styles ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary Button */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--light-bg);
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px var(--shadow-primary);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
    border-color: var(--primary-hover);
    color: var(--light-bg);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-primary);
}

.btn-primary:active:not(:disabled) {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(0);
    box-shadow: 0 2px 6px var(--shadow-primary);
}

/* Secondary Button (Outline) */
.btn-outline-primary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--light-bg);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-primary);
}

.btn-outline-primary:active:not(:disabled) {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--light-bg);
    transform: translateY(0);
    box-shadow: 0 2px 6px var(--shadow-primary);
}

/* Secondary Button (Solid) */
.btn-secondary {
    background: var(--secondary-color);
    color: var(--light-bg);
    border-color: var(--secondary-color);
}

.btn-secondary:hover:not(:disabled) {
    background: #047857;
    border-color: #047857;
    color: var(--light-bg);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

.btn-secondary:active:not(:disabled) {
    background: #065F46;
    border-color: #065F46;
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(5, 150, 105, 0.2);
}

/* Success Button */
.btn-success {
    background: var(--secondary-color);
    color: var(--light-bg);
    border-color: var(--secondary-color);
}

.btn-success:hover:not(:disabled) {
    background: #047857;
    border-color: #047857;
    color: var(--light-bg);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

.btn-success:active:not(:disabled) {
    background: #065F46;
    border-color: #065F46;
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(5, 150, 105, 0.2);
}

/* Danger Button */
.btn-danger {
    background: var(--accent-color);
    color: var(--light-bg);
    border-color: var(--accent-color);
}

.btn-danger:hover:not(:disabled) {
    background: #B91C1C;
    border-color: #B91C1C;
    color: var(--light-bg);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.btn-danger:active:not(:disabled) {
    background: #991B1B;
    border-color: #991B1B;
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(220, 38, 38, 0.2);
}

/* Warning Button */
.btn-warning {
    background: #F59E0B;
    color: var(--light-bg);
    border-color: #F59E0B;
}

.btn-warning:hover:not(:disabled) {
    background: #D97706;
    border-color: #D97706;
    color: var(--light-bg);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-warning:active:not(:disabled) {
    background: #B45309;
    border-color: #B45309;
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.2);
}

/* Light Button */
.btn-light {
    background: var(--light-bg);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-light:hover:not(:disabled) {
    background: var(--light-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-light:active:not(:disabled) {
    background: var(--light-tertiary);
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

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

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 16px;
    font-weight: 600;
}

/* Button with Icon */
.btn i {
    font-size: 14px;
}

.btn-lg i {
    font-size: 16px;
}

/* ===== Utility Classes ===== */

/* Text Overflow */
.text-three-overflow {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
}

.text-two-overflow {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.text-one-overflow {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

/* ===== Responsive Container ===== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* ===== Clearfix ===== */
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}