/* Hamburger Button Styles */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 2001;
}
.hamburger-bar {
    width: 28px;
    height: 3px;
    background: var(--gray-900);
    margin: 4px 0;
    border-radius: 2px;
    transition: all 0.3s;
}

@media (max-width: 768px) {
    .hamburger {
        display: flex !important;
    }
    #main-nav-wrapper {
        width: 100vw;
        position: absolute;
        top: 64px;
        left: 0;
        background: var(--gray-50);
        box-shadow: var(--shadow-lg);
        z-index: 2000;
        transition: max-height 0.3s, opacity 0.3s;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
    }
    #main-nav-wrapper.open {
        max-height: calc(100vh - 64px);
        opacity: 1;
        overflow-y: auto;
        padding-bottom: 32px;
    }
    #main-nav-wrapper .main-nav {
        padding-bottom: 32px;
    }
    #main-nav-wrapper .btn-sm {
        display: block;
        margin: 16px auto 0 auto;
        background: var(--primary-600);
        color: #fff !important;
        border: none;
        box-shadow: 0 2px 8px rgba(79,70,229,0.08);
    }
    .main-nav {
        display: flex !important;
        flex-direction: column;
        gap: 0;
        padding: 16px 0;
    }
    .nav-link, .dropdown-toggle {
        width: 100%;
        text-align: left;
        padding: 14px 24px;
        border-radius: 0;
        font-size: var(--text-lg);
        background: none;
        border: none;
        color: var(--gray-900);
    }
    .nav-dropdown {
        width: 100%;
    }
    .main-nav > div[style*="margin-left: auto"] {
        margin-left: 0 !important;
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    #main-nav-wrapper .btn-sm {
        display: block;
        margin: 24px auto 0 auto;
        background: var(--primary-600);
        color: #fff !important;
        border: none;
        box-shadow: 0 2px 8px rgba(79,70,229,0.08);
        text-align: center;
        width: 48px;
        height: 48px;
        border-radius: 50%;
        font-size: 1.5rem;
    }
    .dropdown-content {
        position: static;
        box-shadow: none;
        min-width: 0;
        width: 100%;
        transform: none !important;
        background: var(--gray-100);
        margin-top: 0;
        padding: 0;
        display: none;
    }
    .nav-dropdown.open .dropdown-content {
        display: block;
    }
}
/* ================================
   Modern Design System - Online Tools
   ================================ */

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors */
    --primary-50: #EEF2FF;
    --primary-100: #E0E7FF;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;

    /* Success Colors */
    --success-50: #ECFDF5;
    --success-500: #10B981;
    --success-600: #059669;

    /* Warning Colors */
    --warning-50: #FFFBEB;
    --warning-500: #F59E0B;
    --warning-600: #D97706;

    /* Danger Colors */
    --danger-50: #FEF2F2;
    --danger-500: #EF4444;
    --danger-600: #DC2626;

    /* Neutral Colors */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-500: #6B7280;
    --gray-700: #374151;
    --gray-900: #111827;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10B981 0%, #059669 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

    /* Spacing Scale */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;

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

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

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

/* Dark Mode Variables */
/* Dark Mode Variables (Softer "Zinc" Palette) */
[data-theme="dark"] {
    --gray-50: #18181b;
    /* Zinc 950 - Main Background */
    --gray-100: #27272a;
    /* Zinc 900 - Card Background */
    --gray-200: #3f3f46;
    /* Zinc 700 - Borders */
    --gray-300: #52525b;
    /* Zinc 600 */
    --gray-500: #a1a1aa;
    /* Zinc 400 - Secondary Text */
    --gray-700: #e4e4e7;
    /* Zinc 200 - Primary Text */
    --gray-900: #f4f4f5;
    /* Zinc 100 - Headings */

    /* Softer Primary in Dark Mode */
    --primary-50: #1e1b4b;
    --primary-100: #312e81;
    --primary-500: #818cf8;
    /* Indigo 400 */
    --primary-600: #6366f1;
    /* Indigo 500 */
    --primary-700: #a5b4fc;
    /* Indigo 300 */

    /* Softer Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);

    /* Status Colors (Pastel/Bright for readability) */
    --success-50: #064e3b;
    --success-500: #34d399;
    --success-600: #6ee7b7;

    --warning-50: #451a03;
    --warning-500: #fbbf24;
    --warning-600: #fcd34d;

    --danger-50: #450a0a;
    --danger-500: #f87171;
    --danger-600: #fca5a5;
}

/* Dark Mode Specific Overrides */
[data-theme="dark"] .card,
[data-theme="dark"] .tool-card,
[data-theme="dark"] .result-card,
[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background-color: var(--gray-50);
    /* Darker background for inputs */
    border-color: var(--gray-200);
    color: white;
}

[data-theme="dark"] ::placeholder {
    color: var(--gray-500);
}

/* Fix Autofill in Dark Mode */
[data-theme="dark"] input:-webkit-autofill,
[data-theme="dark"] input:-webkit-autofill:hover,
[data-theme="dark"] input:-webkit-autofill:focus,
[data-theme="dark"] input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--gray-50) inset !important;
    -webkit-text-fill-color: white !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* Fix Focus State in Dark Mode */
[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
    background-color: var(--gray-100);
    /* Keep it dark on focus */
    border-color: var(--primary-500);
    color: white;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
    /* Softer focus ring */
}

[data-theme="dark"] .tool-card h1 {
    background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

[data-theme="dark"] .related {
    background: #1F2937;
    border-color: #374151;
}

[data-theme="dark"] .related li a {
    background: #374151;
    border-color: #4B5563;
    color: #F9FAFB;
}

[data-theme="dark"] .related li a:hover {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
}

/* ===== Base Styles ===== */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    margin: 0;
    padding: 0;
    color: var(--gray-900);
    background-color: var(--gray-50);
    /* Use background-color for clarity */
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Dark Mode Global Overrides */
[data-theme="dark"] body {
    background-color: var(--gray-50);
    /* This variable changes in dark mode block */
    color: var(--gray-900);
}

/* ===== Utility Classes ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    width: 100%;
}

/* ===== Header ===== */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
    /* Flex moved to inner container */
}

[data-theme="dark"] header {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    border-bottom: none;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
}

header a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

[data-theme="dark"] header a {
    color: rgba(255, 255, 255, 0.8);
}

header a:hover {
    color: #fff;
    transform: translateY(-1px);
}

[data-theme="dark"] header a:hover {
    color: #fff;
}

header h1,
.header-brand {
    margin: 0;
    font-size: var(--text-xl);
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

[data-theme="dark"] header h1,
[data-theme="dark"] .header-brand {
    color: #fff;
}

header nav {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    gap: var(--space-xs);
}

header nav a {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

header nav a:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

[data-theme="dark"] header nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ===== Main Layout & Grid ===== */
.tools-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-200);
}

.card a {
    text-decoration: none;
    color: inherit;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card h3 {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--text-xl);
    color: var(--gray-900);
}

.card p {
    margin: 0;
    color: var(--gray-500);
    font-size: var(--text-sm);
    line-height: 1.5;
}

/* Tool Page Layout */
.tool-page {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

.tool-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.tool-card h1 {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--text-3xl);
    font-weight: 800;
    letter-spacing: -1px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.tool-card>p {
    font-size: var(--text-lg);
    color: var(--gray-500);
    margin-bottom: var(--space-xl);
}

/* Form Elements */
form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-sm);
    flex-wrap: wrap;
    /* Allow wrapping on very small screens */
}

.inputs {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

label {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-700);
}

input,
select,
textarea {
    padding: var(--space-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    background: var(--gray-50);
}

/* Fuel card layout fixes: ensure inputs align and wrap nicely */
#fuel-card form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#fuel-card form .row,
#fuel-card form .fuel-row {
    display: flex;
    gap: 8px;
}

#fuel-card .input {
    min-width: 0;
}

@media (max-width: 560px) {
    #fuel-card form .row,
    #fuel-card form .fuel-row {
        flex-direction: column;
    }
}

/* Homepage ticker styling */
.ticker-item {
    display: inline-block;
    padding: 6px 12px;
    margin: 0 6px;
    background: rgba(0,0,0,0.04);
    border-radius: 8px;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
    text-decoration: none;
}

.ticker-item a {
    color: var(--primary-600);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.ticker-item:hover {
    background: rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

/* Color coding for different asset classes */
.ticker-item.crypto {
    color: #F59E0B;
}

.ticker-item.forex {
    color: #10B981;
}

.ticker-item.metal {
    color: #EC4899;
}

.ticker-item.recommended {
    color: #3B82F6;
}

/* Dark mode color adjustments */
[data-theme="dark"] .ticker-item.crypto {
    color: #FBBF24;
}

[data-theme="dark"] .ticker-item.forex {
    color: #6EE7B7;
}

[data-theme="dark"] .ticker-item.metal {
    color: #F472B6;
}

[data-theme="dark"] .ticker-item.recommended {
    color: #60A5FA;
}

/* Commodity and weather colors */
.ticker-item.commodity {
    color: #F97316; /* Orange-ish for commodities */
}
.ticker-item.weather {
    color: #06B6D4; /* Cyan for weather */
}

[data-theme="dark"] .ticker-item.commodity {
    color: #FB923C;
}
[data-theme="dark"] .ticker-item.weather {
    color: #67E8F9;
}

.ticker-section {
    background: linear-gradient(90deg, var(--gray-50) 0%, var(--gray-100) 50%, var(--gray-50) 100%);
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-200);
    overflow: hidden;
}

.ticker-container {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 0;
}

.ticker-label {
    font-weight: 700;
    color: var(--gray-700);
    flex-shrink: 0;
    white-space: nowrap;
    font-size: var(--text-sm);
}

.ticker-viewport {
    flex: 1;
    overflow: hidden;
    min-width: 0;
}

.ticker-track {
    display: flex;
    animation: ticker-scroll-rtl 25s linear infinite;
    will-change: transform;
}

@keyframes ticker-scroll-rtl {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.ticker-meta {
    color: var(--gray-500);
    font-size: var(--text-xs);
    white-space: nowrap;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .ticker-container {
        gap: 8px;
    }
    .ticker-item {
        padding: 4px 8px;
        margin: 0 4px;
        font-size: 0.85rem;
    }
    .ticker-meta { display: none; }
}

@media (max-width: 480px) {
    .ticker-label { display: none; }
    .ticker-item {
        padding: 3px 6px;
        margin: 0 3px;
        font-size: 0.8rem;
    }
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
    background: white;
}

button {
    padding: 6px var(--space-md);
    /* Reduced padding */
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    /* Reduced font size */
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    opacity: 0.95;
}

button:active {
    transform: translateY(0);
}

/* Secondary Button (Clear/Reset) */
.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--gray-50);
    color: var(--gray-900);
    border-color: var(--gray-400);
}

[data-theme="dark"] .btn-secondary {
    background: var(--gray-100);
    color: var(--gray-500);
    border-color: var(--gray-200);
}

[data-theme="dark"] .btn-secondary:hover {
    background: var(--gray-200);
    color: white;
}

/* ===== Result Display ===== */
.result {
    margin-top: var(--space-xl);
    padding: var(--space-xl);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    min-height: 60px;
}

[data-theme="dark"] .result {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.result:empty {
    display: none;
}

/* Result Card - Modern formatted results */
.result-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
}

[data-theme="dark"] .result-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.result-card h3 {
    margin: 0 0 var(--space-md) 0;
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--gray-700);
}

[data-theme="dark"] .result-card h3 {
    color: var(--gray-500);
}

.result-value {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--primary-600);
    margin: var(--space-md) 0;
    font-family: var(--font-mono);
}

[data-theme="dark"] .result-value {
    color: var(--primary-500);
}

.result-label {
    font-size: var(--text-sm);
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.result-meta {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.result-meta-item {
    flex: 1;
    min-width: 150px;
}

.result-meta-item strong {
    display: block;
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
}

[data-theme="dark"] .result-meta-item strong {
    color: white;
}

.result-meta-item span {
    display: block;
    font-size: var(--text-sm);
    color: var(--gray-500);
}

/* Category Badges */
.category-badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    margin: var(--space-md) 0;
}

.category-badge.success {
    background: var(--success-50);
    color: var(--success-700);
    border: 1px solid var(--success-200);
}

.category-badge.warning {
    background: var(--warning-50);
    color: var(--warning-700);
    border: 1px solid var(--warning-200);
}

.category-badge.danger {
    background: var(--danger-50);
    color: var(--danger-700);
    border: 1px solid var(--danger-200);
}

/* ===== Content Sections (Formula, Examples, FAQ) ===== */
.content-card {
    background: white;
    border: 1px solid var(--gray-200);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
}

[data-theme="dark"] .content-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.formula-card {
    background: var(--gray-50);
    border-left: 4px solid var(--primary-500);
}

[data-theme="dark"] .formula-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
    border-left-color: var(--primary-500);
}

.formula-text {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--gray-800);
    margin: 0;
}

[data-theme="dark"] .formula-text {
    color: var(--gray-700);
}

.example-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.example-list li {
    margin-bottom: var(--space-xs);
    border-bottom: 1px dashed var(--gray-200);
    padding-bottom: var(--space-xs);
    color: var(--gray-700);
}

[data-theme="dark"] .example-list li {
    border-color: var(--gray-200);
    color: var(--gray-500);
}

.faq-grid details {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

[data-theme="dark"] .faq-grid details {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.faq-grid summary {
    font-weight: 600;
    cursor: pointer;
    color: var(--gray-800);
}

[data-theme="dark"] .faq-grid summary {
    color: var(--gray-700);
}

.faq-grid p {
    color: var(--gray-600);
    margin-top: var(--space-sm);
}

[data-theme="dark"] .faq-grid p {
    color: var(--gray-500);
}

/* Recommendation Cards */
.recommendation-card {
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .recommendation-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.recommendation-card h3 {
    margin-top: 0;
    color: var(--gray-800);
}

[data-theme="dark"] .recommendation-card h3 {
    color: white;
}

.recommendation-card.highlight {
    background: var(--primary-50);
    border-color: var(--primary-100);
}

[data-theme="dark"] .recommendation-card.highlight {
    background: rgba(99, 102, 241, 0.1);
    /* Low opacity primary */
    border-color: var(--primary-100);
}

.recommendation-card.highlight h3 {
    color: var(--primary-700);
}

[data-theme="dark"] .recommendation-card.highlight h3 {
    color: var(--primary-500);
}

.recommendation-list a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--gray-800);
    font-weight: 500;
    padding: var(--space-sm);
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    transition: all 0.2s;
}

[data-theme="dark"] .recommendation-list a {
    background: var(--gray-50);
    border-color: var(--gray-200);
    color: var(--gray-700);
}

.recommendation-list a:hover {
    transform: translateX(4px);
    border-color: var(--primary-500);
}

/* Amortization Table */
.amortization-container {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .amortization-container {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.amortization-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
}

[data-theme="dark"] .amortization-table {
    background: var(--gray-50);
}

.amortization-table th {
    background: var(--gray-100);
    color: var(--gray-700);
    font-weight: 600;
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

[data-theme="dark"] .amortization-table th {
    background: var(--gray-200);
    /* Slightly lighter than bg */
    color: var(--gray-900);
    /* White text */
    border-color: var(--gray-300);
}

.amortization-table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

[data-theme="dark"] .amortization-table td {
    border-color: var(--gray-200);
    color: var(--gray-500);
}

.amortization-table tr:nth-child(even) {
    background: var(--gray-50);
}

[data-theme="dark"] .amortization-table tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.03);
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
}

.toast {
    background: #fff;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 250px;
    pointer-events: all;
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid var(--primary-500);
}

.toast.success {
    border-left-color: var(--success-500);
}

.toast.error {
    border-left-color: var(--danger-500);
}

.toast-message {
    flex: 1;
    font-size: var(--text-sm);
    color: var(--gray-700);
    font-weight: 500;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== Loading State ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary-600);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== Related Tools ===== */
.related {
    margin-top: var(--space-2xl);
    padding: var(--space-2xl);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.related h4 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--gray-900);
    margin: 0 0 var(--space-lg) 0;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.related h4::before {
    content: "🔗";
    font-size: var(--text-2xl);
}

.related ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.related li a {
    display: inline-block;
    padding: var(--space-md) var(--space-lg);
    background: white;
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-base);
    border: 2px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.related li a:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===== Ad Slot ===== */
.ad-slot {
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background: var(--gray-50);
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--gray-400);
    font-size: var(--text-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .tools-grid {
        padding: var(--space-lg);
    }

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

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

    .tool-card h1 {
        font-size: var(--text-2xl);
    }

    .result-value {
        font-size: var(--text-3xl);
    }

    .result-meta {
        flex-direction: column;
    }

    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
    }

    .toast {
        min-width: auto;
    }

    /* Stack buttons vertically on mobile for better touch targets */
    /* Stack buttons vertically on mobile for better touch targets */
    form button {
        /* width: 100%; Removed to prevent "too big" look */
        margin-top: var(--space-sm);
    }

    form .btn-secondary {
        margin-left: var(--space-sm);
    }
}

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

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

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

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

/* ===== Blog Page Styles ===== */
.blog-card {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

[data-theme="dark"] .blog-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.blog-card h2 a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

[data-theme="dark"] .blog-card h2 a {
    color: var(--primary-500);
}

.blog-card h2 a:hover {
    color: var(--primary-700);
}

[data-theme="dark"] .blog-card h2 a:hover {
    color: var(--primary-400);
}

.blog-card p {
    color: var(--gray-600);
    margin: var(--space-sm) 0;
    line-height: 1.6;
}

[data-theme="dark"] .blog-card p {
    color: var(--gray-500);
}

.read-more {
    color: var(--primary-600);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: gap var(--transition-fast);
}

[data-theme="dark"] .read-more {
    color: var(--primary-500);
}

.read-more:hover {
    gap: var(--space-sm);
}

/* ===== Individual Blog Post Styles ===== */
.blog-post-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

.blog-post-content {
    background: white;
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .blog-post-content {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.blog-post-content h1 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-sm);
    color: var(--gray-900);
}

[data-theme="dark"] .blog-post-content h1 {
    color: white;
}

.blog-post-content h2 {
    font-size: var(--text-2xl);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--gray-800);
}

[data-theme="dark"] .blog-post-content h2 {
    color: var(--gray-100);
}

.blog-post-content p,
.blog-post-content li {
    font-size: var(--text-lg);
    line-height: 1.7;
    color: var(--gray-700);
    margin-bottom: var(--space-md);
}

[data-theme="dark"] .blog-post-content p,
[data-theme="dark"] .blog-post-content li {
    color: var(--gray-500);
}

.blog-post-content a {
    color: var(--primary-600);
    text-decoration: none;
    font-weight: 500;
}

[data-theme="dark"] .blog-post-content a {
    color: var(--primary-500);
}

.blog-post-content a:hover {
    text-decoration: underline;
}

/* ================================
   Navigation Dropdowns (Refined)
   ================================ */

/* Header spacing: ensure logo and nav are equidistant */
header .container > div {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
}

header h1 {
    margin: 0;
    font-size: var(--text-2xl);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-left: var(--space-lg);
}

.nav-link {
    background: transparent;
    border: none;
    color: var(--gray-900);
    font-size: var(--text-base);
    font-weight: 600;
    padding: 8px 12px;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition-base), color var(--transition-base), opacity var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: var(--radius-md);
}

[data-theme="dark"] .nav-link {
    color: var(--gray-900);
}

.nav-link:hover {
    background: rgba(0,0,0,0.06);
    opacity: 0.95;
}

.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    padding: 6px 10px !important;
    border-radius: var(--radius-md);
    background: transparent;
    border: none;
}

.dropdown-toggle:hover {
    background: rgba(0,0,0,0.04) !important;
}

.dropdown-content {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-sm) 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all var(--transition-base);
    z-index: 1000;
    margin-top: var(--space-sm);
}

[data-theme="dark"] .dropdown-content {
    background: var(--gray-100);
}

.nav-dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 8px 14px;
    color: var(--gray-700);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: background var(--transition-fast);
    white-space: normal;
    max-width: 240px;
    overflow: hidden;
    text-overflow: ellipsis;
}

[data-theme="dark"] .dropdown-item {
    color: var(--gray-900);
}

.dropdown-item:hover {
    background: var(--gray-200);
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--gray-300);
}

.dropdown-header {
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: none;
    color: var(--gray-600);
    padding: 8px 14px;
    margin: 0 0 6px 0;
    letter-spacing: 0.2px;
}

[data-theme="dark"] .dropdown-header {
    color: var(--gray-900);
}

/* Dark-mode specific hover tweaks */
[data-theme="dark"] .nav-link:hover {
    background: rgba(255,255,255,0.04);
}
[data-theme="dark"] .dropdown-toggle:hover {
    background: rgba(255,255,255,0.03) !important;
}

.dropdown-more {
    color: var(--primary-600);
    font-weight: 600;
    border-top: 1px solid var(--gray-200);
    margin-top: var(--space-sm);
    padding: 8px 14px;
    display: block;
    text-align: right;
}

[data-theme="dark"] .dropdown-more {
    border-top-color: var(--gray-300);
    color: var(--primary-500);
}

/* Mega Dropdown (3-4 columns) */
.mega-dropdown {
    min-width: 700px;
    max-width: 1100px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0;
    padding: 0;
}

.dropdown-column {
    padding: var(--space-sm) 0;
    border-right: 1px solid var(--gray-200);
}

[data-theme="dark"] .dropdown-column {
    border-right-color: var(--gray-300);
}

.dropdown-column:last-child {
    border-right: none;
}

.dropdown-column .dropdown-header {
    padding: 6px 14px;
    color: var(--primary-600);
    font-weight: 700;
}

[data-theme="dark"] .dropdown-column .dropdown-header {
    color: var(--primary-500);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }

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

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

    .mega-dropdown {
        min-width: auto;
        width: 100vw;
        grid-template-columns: 1fr;
    }

    .dropdown-column {
        border-right: none;
        border-bottom: 1px solid var(--gray-200);
    }

    .dropdown-column:last-child {
        border-bottom: none;
    }
}