/* ==========================================================================
   FinanceSliders Design System & Core Styles
   ========================================================================== */

:root {
    --font-main: 'Plus Jakarta Sans', sans-serif;
    
    /* Dark Mode Theme Tokens (Default) */
    --color-bg: hsl(222, 47%, 6%);
    --color-card: hsla(223, 40%, 12%, 0.6);
    --color-card-solid: hsl(223, 40%, 11%);
    --color-primary: hsl(158, 95%, 43%);
    --color-primary-light: hsl(158, 95%, 55%);
    --color-accent: hsl(35, 100%, 55%);
    --color-accent-light: hsl(35, 100%, 65%);
    --color-border: hsla(223, 20%, 20%, 0.5);
    --color-text: hsl(210, 40%, 98%);
    --color-text-muted: hsl(217, 20%, 70%);
    --color-success: hsl(142, 70%, 45%);
    --color-danger: hsl(350, 80%, 55%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Override */
[data-theme="light"] {
    --color-bg: hsl(210, 30%, 95%);
    --color-card: rgba(255, 255, 255, 0.85);
    --color-card-solid: hsl(0, 0%, 100%);
    --color-border: rgba(148, 163, 184, 0.2);
    --color-text: hsl(222, 47%, 12%);
    --color-text-muted: hsl(215, 16%, 47%);
    --shadow-md: 0 8px 30px rgba(148, 163, 184, 0.15);
    --shadow-lg: 0 16px 40px rgba(148, 163, 184, 0.2);
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Layout */
.app-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(var(--color-bg), 0.8);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.75rem;
}

.logo-img {
    height: 36px;
    width: auto;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--color-text);
}

.logo-text span {
    color: var(--color-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.currency-dropdown {
    background-color: var(--color-card-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-base);
    font-family: var(--font-main);
}

.currency-dropdown:hover, .currency-dropdown:focus {
    border-color: var(--color-primary);
}

.theme-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.theme-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background-color: rgba(0, 245, 141, 0.05);
}

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

/* Toggle Sun/Moon display */
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* Ad Containers */
.ad-container {
    max-width: 1200px;
    margin: 1.5rem auto;
    padding: 0 1.5rem;
    width: 100%;
}

.ad-placeholder {
    background-color: var(--color-card);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-sm);
    height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.ad-badge {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    padding: 1px 6px;
    border-radius: 3px;
    margin-bottom: 0.25rem;
}

.ad-text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.5px;
}

/* Navigation Tabs */
.nav-tabs-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.nav-tabs {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.35rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    padding: 0.75rem;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition-base);
}

.tab-btn svg {
    width: 18px;
    height: 18px;
}

.tab-btn:hover {
    color: var(--color-text);
    background-color: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: hsl(222, 47%, 6%);
    background-color: var(--color-primary);
}

[data-theme="light"] .tab-btn.active {
    color: white;
}

/* Main View */
.main-view {
    flex: 1;
    max-width: 1200px;
    margin: 1.5rem auto;
    padding: 0 1.5rem;
    width: 100%;
}

/* Interactive Split Layout */
.calculator-layout {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 1.5rem;
    align-items: start;
}

.calc-panel-left {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

.calc-panel-right {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Form Controls & Sliders */
.calc-header {
    margin-bottom: 1.5rem;
}

.calc-title {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.calc-description {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.control-label {
    font-weight: 600;
    font-size: 0.9rem;
}

.control-value-display {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--color-primary-light);
    background-color: rgba(0, 245, 141, 0.08);
    padding: 2px 8px;
    border-radius: 6px;
    font-variant-numeric: tabular-nums;
}

/* Input Styles */
.slider-input {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--color-border);
    outline: none;
    margin: 10px 0;
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 245, 141, 0.4);
    transition: var(--transition-base);
}

.slider-input::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--color-primary-light);
}

.slider-limits {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Select and Toggle Inputs */
.select-input {
    width: 100%;
    background-color: var(--color-card-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    outline: none;
    cursor: pointer;
}

/* Summary Cards & Outputs */
.summary-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.stat-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
}

.stat-value.highlight {
    color: var(--color-primary);
}

.stat-value.accent {
    color: var(--color-accent);
}

/* Visual Chart Container */
.chart-container-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    position: relative;
    width: 100%;
}

.chart-wrapper {
    position: relative;
    height: 320px;
    width: 100%;
}

/* Legal Pages Styling */
.legal-container {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem 2.5rem;
    box-shadow: var(--shadow-md);
    max-width: 800px;
    margin: 2rem auto;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.breadcrumbs a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-base);
}

.breadcrumbs a:hover {
    color: var(--color-primary);
}

.legal-header {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.legal-header h1 {
    font-size: 2rem;
    font-weight: 800;
}

.legal-body h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-primary-light);
}

.legal-body p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem 1.5rem;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-primary);
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }
    
    .nav-tabs {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .summary-cards-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* ==========================================================================
   SEO FAQ Panel and Print styles (Upgrade)
   ========================================================================== */

.calc-seo-section {
    margin-top: 3.5rem;
    border-top: 1px solid var(--color-border);
    padding-top: 2.5rem;
    width: 100%;
}

.seo-section-title {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.seo-section-desc {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.seo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.seo-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.seo-card h3 {
    color: var(--color-primary-light);
    margin-bottom: 0.75rem;
    font-size: 1.15rem;
    font-weight: 700;
}

.seo-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* PDF Export Button */
/* Calc Actions Layout & Buttons */
.calc-actions-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-export-pdf {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--color-card-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.8rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-base);
    width: 100%;
}

.btn-export-pdf:hover {
    background-color: var(--color-primary);
    color: hsl(222, 47%, 6%);
    border-color: var(--color-primary);
}

.btn-export-pdf svg {
    width: 18px;
    height: 18px;
}

.btn-share-x {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--color-card-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.8rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-base);
    width: 100%;
}

.btn-share-x:hover {
    background-color: #000000;
    color: #ffffff;
    border-color: #333333;
}

[data-theme="light"] .btn-share-x:hover {
    background-color: #111111;
    color: #ffffff;
}

.btn-share-x svg {
    width: 16px;
    height: 16px;
}

/* Fetch Live Price Button for Crypto */
.btn-fetch-live {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    background-color: rgba(0, 245, 141, 0.08);
    border: 1px solid rgba(0, 245, 141, 0.3);
    color: var(--color-primary-light);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-base);
    margin-top: 0.5rem;
}

.btn-fetch-live:hover {
    background-color: var(--color-primary);
    color: hsl(222, 47%, 6%);
}

.btn-fetch-live svg {
    width: 12px;
    height: 12px;
}

/* Print Stylesheet */
@media print {
    body {
        background-color: white !important;
        color: black !important;
        font-size: 12pt;
    }
    .site-header, 
    .nav-tabs-container, 
    .calc-panel-left, 
    .ad-container, 
    .site-footer, 
    .btn-export-pdf,
    .btn-share-x,
    .calc-seo-section {
        display: none !important;
    }
    .main-view {
        margin: 0 !important;
        padding: 0 !important;
        max-width: 100% !important;
    }
    .calculator-layout {
        grid-template-columns: 1fr !important;
        gap: 0 !important;
    }
    .calc-panel-right {
        width: 100% !important;
    }
    .summary-cards-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 1cm !important;
        margin-bottom: 2cm !important;
    }
    .stat-card {
        border: 1px solid #ccc !important;
        background-color: #f9f9f9 !important;
        color: black !important;
        box-shadow: none !important;
        padding: 0.5cm !important;
    }
    .stat-value {
        color: black !important;
    }
    .chart-container-card {
        border: none !important;
        box-shadow: none !important;
        background: transparent !important;
    }
    .chart-wrapper {
        height: 12cm !important;
    }
}

@media (max-width: 768px) {
    .seo-grid {
        grid-template-columns: 1fr;
    }
}