/* ============================================
   dTS Instruments — Financial Analysis App
   Global Design System
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Corporate Colors */
    --dts-primary: #003E51;
    --dts-primary-light: #005670;
    --dts-primary-dark: #002a38;
    --dts-secondary: #00B0B9;
    --dts-secondary-light: #33c5cc;
    --dts-secondary-dark: #008a91;

    /* Semantic Colors */
    --color-success: #4CAF50;
    --color-success-bg: rgba(76, 175, 80, 0.1);
    --color-warning: #FF9800;
    --color-warning-bg: rgba(255, 152, 0, 0.1);
    --color-danger: #E8443A;
    --color-danger-bg: rgba(232, 68, 58, 0.1);
    --color-info: #2196F3;
    --color-info-bg: rgba(33, 150, 243, 0.1);

    /* Chart Colors */
    --chart-green-dark: #2d6a2e;
    --chart-green: #4CAF50;
    --chart-green-light: #81C784;
    --chart-green-pale: #C8E6C9;
    --chart-orange: #FF9800;
    --chart-orange-light: #FFB74D;
    --chart-blue: #003E51;
    --chart-blue-light: #00B0B9;
    --chart-red: #E8443A;
    --chart-yellow: #FFC107;

    /* Neutrals */
    --bg-body: #F4F6F9;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F9FBFD;
    --bg-sidebar: #003E51;
    --border-color: #E2E8F0;
    --border-light: #F0F2F5;
    --text-primary: #1A202C;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --text-on-dark: #E8EDF2;
    --text-on-primary: #FFFFFF;

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

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed: 0px;
    --header-height: 64px;
    --content-max-width: 1400px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Font */
    --font-primary: 'Carlito', 'Inter', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-body: #0F172A;
    --bg-card: #1E293B;
    --bg-card-hover: #263548;
    --border-color: #334155;
    --border-light: #1E293B;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

/* --- App Layout (Sidebar + Main) --- */
#app {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-slow);
}

/* --- Main Header --- */
.main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--space-xl);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.page-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--dts-primary);
    letter-spacing: -0.02em;
}

[data-theme="dark"] .page-title {
    color: var(--dts-secondary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

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

.year-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--dts-primary), var(--dts-primary-light));
    color: white;
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* --- Page Content --- */
.page-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
    scroll-behavior: smooth;
}

.page-content::-webkit-scrollbar {
    width: 6px;
}

.page-content::-webkit-scrollbar-track {
    background: transparent;
}

.page-content::-webkit-scrollbar-thumb {
    background-color: var(--text-muted);
    border-radius: 3px;
}

/* --- Loading Screen --- */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 60vh;
    gap: var(--space-lg);
    color: var(--text-secondary);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--dts-secondary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* --- Section Layout Helpers --- */
.module-section {
    max-width: var(--content-max-width);
    margin: 0 auto;
    animation: fadeInUp 0.4s ease-out;
}

.section-header {
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dts-primary);
    margin-bottom: var(--space-xs);
}

[data-theme="dark"] .section-title {
    color: var(--dts-secondary);
}

.section-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.grid-2-1 {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-lg);
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.animate-in {
    animation: fadeInUp 0.4s ease-out forwards;
}

.animate-delay-1 { animation-delay: 0.05s; }
.animate-delay-2 { animation-delay: 0.1s; }
.animate-delay-3 { animation-delay: 0.15s; }
.animate-delay-4 { animation-delay: 0.2s; }

/* --- Utility Classes --- */
.text-success { color: var(--color-success) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-info { color: var(--color-info) !important; }
.text-muted { color: var(--text-secondary) !important; }
.text-bold { font-weight: 700; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mt-lg { margin-top: var(--space-lg); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* --- Help Icon (contextual tooltips) --- */
.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    font-size: 11px;
    font-weight: 700;
    color: var(--dts-secondary);
    border: 1.5px solid var(--dts-secondary);
    border-radius: 50%;
    cursor: help;
    vertical-align: middle;
    margin-left: 6px;
    transition: all var(--transition-fast);
    position: relative;
    flex-shrink: 0;
}

.help-icon:hover {
    background: var(--dts-secondary);
    color: white;
}

.help-icon .tooltip-text {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--dts-primary);
    color: white;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 400;
    white-space: normal;
    width: 260px;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    line-height: 1.4;
    transition: all var(--transition-fast);
    pointer-events: none;
}

.help-icon .tooltip-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--dts-primary);
}

.help-icon:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* --- Select / Dropdown --- */
.select-wrapper {
    position: relative;
    display: inline-block;
}

.select-input {
    appearance: none;
    padding: 8px 36px 8px 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    min-width: 130px;
}

.select-input:focus {
    outline: none;
    border-color: var(--dts-secondary);
}

.select-wrapper::after {
    content: '▾';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 1.1rem;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--dts-primary), var(--dts-primary-light));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 62, 81, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--dts-secondary), var(--dts-secondary-light));
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 176, 185, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--dts-primary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--dts-secondary);
    color: var(--dts-secondary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
    .main-content {
        margin-left: 0;
    }

    .mobile-menu-btn {
        display: block;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .grid-2-1 {
        grid-template-columns: 1fr;
    }

    .page-content {
        padding: var(--space-md);
    }

    .main-header {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 600px) {
    html { font-size: 14px; }

    .page-title {
        font-size: 1.1rem;
    }
}