/* ========================================
   VIETNAMESE TOOLS - MAIN CSS
   Design: Modern Vietnamese Elegance
   ======================================== */

/* === CSS Variables === */
:root {
    /* Colors - Vietnamese Palette */
    --color-primary: #C41E3A;
    --color-primary-dark: #9E1830;
    --color-primary-light: #E8425A;
    --color-secondary: #D4AF37;
    --color-secondary-dark: #B8962F;
    --color-secondary-light: #E6C65C;

    /* Backgrounds */
    --bg-main: #FFF8F0;
    --bg-surface: #FFFFFF;
    --bg-surface-elevated: #FFFFFF;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    /* Text */
    --text-primary: #2D2D2D;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --text-inverse: #FFFFFF;

    /* Status Colors */
    --color-success: #4CAF50;
    --color-success-light: #E8F5E9;
    --color-warning: #FF9800;
    --color-warning-light: #FFF3E0;
    --color-danger: #E53935;
    --color-danger-light: #FFEBEE;
    --color-info: #2196F3;
    --color-info-light: #E3F2FD;

    /* Good/Bad Day Colors */
    --color-good-day: #4CAF50;
    --color-good-day-bg: #E8F5E9;
    --color-bad-day: #E53935;
    --color-bad-day-bg: #FFEBEE;
    --color-neutral-day: #FF9800;
    --color-neutral-day-bg: #FFF3E0;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Typography */
    --font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

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

    --border-color: #E0E0E0;
    --border-color-light: #F0F0F0;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

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

    /* Layout */
    --nav-width: 240px;
    --nav-width-collapsed: 72px;
    --bottom-nav-height: 64px;
    --header-height: 64px;

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-main);
    min-height: 100vh;
    overflow-x: hidden;
}

img, svg {
    display: block;
    max-width: 100%;
}

button, input, select, textarea {
    font: inherit;
    color: inherit;
}

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

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

ul, ol {
    list-style: none;
}

/* === App Container === */
.app-container {
    display: flex;
    min-height: 100vh;
    background-color: var(--bg-main);
}

/* === Side Navigation === */
.side-nav {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--nav-width);
    background: var(--bg-surface);
    border-right: 1px solid var(--border-color-light);
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    transition: transform var(--transition-normal);
}

.nav-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color-light);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.nav-menu {
    flex: 1;
    padding: var(--space-md);
    overflow-y: auto;
}

.nav-item {
    margin-bottom: var(--space-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--bg-main);
    color: var(--text-primary);
}

.nav-item.active .nav-link {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

.nav-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.nav-footer {
    padding: var(--space-md);
    border-top: 1px solid var(--border-color-light);
}

.settings-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.settings-btn svg {
    width: 24px;
    height: 24px;
}

/* === Bottom Navigation (Mobile) === */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color-light);
    z-index: var(--z-fixed);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.bottom-nav-item .nav-icon {
    width: 24px;
    height: 24px;
}

.bottom-nav-item.active {
    color: var(--color-primary);
}

.bottom-nav-item:hover {
    color: var(--color-primary);
}

/* === Main Content === */
.main-content {
    flex: 1;
    margin-left: var(--nav-width);
    min-height: 100vh;
    padding: var(--space-lg);
    transition: margin var(--transition-normal);
}

/* === Pages === */
.page {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color-light);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--space-xs);
}

.page-header {
    flex-direction: column;
    align-items: flex-start;
}

.page-header h1 {
    margin-bottom: 0;
}

/* === Economic Calendar Page === */
.economic-container {
    background: var(--bg-surface);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.tradingview-widget-container {
    min-height: 600px;
}

.widget-credit {
    text-align: center;
    padding: var(--space-sm);
    background: var(--bg-main);
    border-top: 1px solid var(--border-color-light);
}

.widget-credit a {
    color: var(--color-primary);
    text-decoration: none;
}

.widget-credit a:hover {
    text-decoration: underline;
}

.header-actions {
    display: flex;
    gap: var(--space-sm);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

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

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

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

.btn-icon {
    width: 40px;
    height: 40px;
    padding: var(--space-sm);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color-light);
    color: var(--text-secondary);
}

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

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

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-overlay);
    animation: fadeIn var(--transition-fast);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    background: var(--bg-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: slideUp var(--transition-normal);
}

.modal-lg {
    max-width: 640px;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color-light);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--text-tertiary);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-main);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-color-light);
}

/* === Form Elements === */
.setting-group {
    margin-bottom: var(--space-lg);
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.setting-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-base);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-surface);
    transition: all var(--transition-fast);
}

.setting-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.setting-hint {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-top: var(--space-xs);
}

/* === Cards === */
.card {
    background: var(--bg-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color-light);
    overflow: hidden;
}

.card-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color-light);
}

.card-body {
    padding: var(--space-lg);
}

/* === Badges === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-full);
}

.badge-success {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

.badge-warning {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.badge-danger {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-info {
    background-color: var(--color-info-light);
    color: var(--color-info);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .side-nav {
        transform: translateX(-100%);
    }

    .side-nav.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }
}

@media (max-width: 600px) {
    .side-nav {
        display: none;
    }

    .bottom-nav {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding: var(--space-md);
        padding-bottom: calc(var(--bottom-nav-height) + var(--space-md));
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

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

    .modal-content {
        max-height: 85vh;
        border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
    }
}

/* === Utilities === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.font-bold { font-weight: var(--font-weight-bold); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-medium { font-weight: var(--font-weight-medium); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }