@import url('https://fonts.googleapis.com/css2?family=Black+Ops+One&family=Jura:wght@300..700&family=Outfit:wght@100..900&family=Work+Sans:ital,wght@0,100..900;1,100..900&family=Yuyu&display=swap');

:root {
    /* Default Dark Theme Variables */
    --bg-primary: #090b0f;
    --bg-secondary: #121620;
    --bg-tertiary: #1a202f;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent-glow: rgba(99, 102, 241, 0.15);
    --border-color: #242b3d;
    --border-focus: #4f46e5;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
}

body.light-theme {
    /* Light Theme Variables */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #4f46e5;
    --accent-hover: #3730a3;
    --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --accent-glow: rgba(79, 70, 229, 0.1);
    --border-color: #e2e8f0;
    --border-focus: #4f46e5;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Outfit', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

/* Header & Navigation */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(18, 22, 32, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

body.light-theme header {
    background: rgba(255, 255, 255, 0.8);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--accent-gradient);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 800;
    font-size: 1.1rem;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.25rem 0.5rem;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--text-secondary);
}

/* Page Layout */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem 2rem;
}

/* Title Section */
.page-header {
    text-align: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Ad Placeholders */
.ad-slot {
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 2rem 0;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.ad-slot::after {
    content: "Advertisement";
    font-weight: 600;
}

/* Calculator Grid */
.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
    .nav-menu {
        display: none; /* simple responsive for now */
    }
    .footer-columns {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .footer-column {
        text-align: center;
        align-items: center;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--card-shadow);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    color: var(--text-primary);
}

/* Input Styles */
.input-group {
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

input[type="number"],
input[type="text"],
input[type="date"],
select,
textarea {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    width: 100%;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Range input styling */
.range-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-primary);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.1);
}

.range-val {
    font-weight: 600;
    min-width: 60px;
    text-align: right;
}

/* Checkbox and Radio styling */
.checkbox-group, .radio-group {
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.checkbox-group input, .radio-group input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* Buttons */
.btn {
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    padding: 0.85rem 1.5rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    margin-top: 0.5rem;
}

.btn:hover {
    opacity: 0.95;
    box-shadow: 0 4px 15px var(--accent-glow);
    transform: translateY(-1px);
}

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

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

/* Results Formatting */
.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border-color);
}

.result-row:last-child {
    border-bottom: none;
}

.result-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.result-value {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.result-highlight {
    background: var(--accent-glow);
    border-left: 4px solid var(--accent);
    padding: 1.25rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 1.5rem;
}

.result-highlight-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.result-highlight-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-weight: 600;
}

.tab.active {
    border-color: var(--accent);
    color: var(--text-primary);
}

/* Info Sections */
.info-section {
    margin-top: 3rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-left: 4px solid var(--accent);
    padding-left: 0.75rem;
}

.info-content {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.info-content p {
    margin-bottom: 1rem;
}

/* Worked Example Card */
.worked-example-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.worked-example-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.worked-example-item {
    display: flex;
    flex-direction: column;
}

.worked-example-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.worked-example-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* FAQ Section */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    overflow: hidden;
}

.faq-question {
    padding: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-tertiary);
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    font-weight: 300;
    transition: var(--transition);
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.25rem 1.25rem 1.25rem;
    color: var(--text-secondary);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Related Tools Grid */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.related-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.related-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: var(--card-shadow);
}

.related-card-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.related-card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* Category Page Hub Styles */
.category-hero {
    text-align: center;
    padding: 3rem 0;
    background: radial-gradient(circle at center, var(--accent-glow) 0%, transparent 70%);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.tool-item-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-item-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 15px 35px -10px var(--accent-glow);
}

.tool-item-card .tool-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.tool-item-card .tool-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tool-item-card .tool-link {
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Homepage Hero */
.home-hero {
    text-align: center;
    padding: 5rem 0 3rem 0;
}

.home-title {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.home-subtitle {
    color: var(--text-secondary);
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto;
}

.home-search {
    max-width: 600px;
    margin: 2.5rem auto;
    position: relative;
}

.home-search input {
    padding: 1.25rem 1.5rem 1.25rem 3rem;
    font-size: 1.1rem;
    border-radius: 50px;
}

.home-search::before {
    content: "🔍";
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.home-category-section {
    margin-bottom: 4rem;
}

.home-category-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}

.home-category-title {
    font-size: 1.75rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.home-category-icon {
    font-size: 1.5rem;
}

.home-category-count {
    background: var(--bg-tertiary);
    font-size: 0.8rem;
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Footer styling */
footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem 2rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 4rem;
}

.footer-columns {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    text-align: left;
}

footer .logo {
    font-size: 1.25rem;
}

footer .logo-icon {
    width: 28px !important;
    height: 28px !important;
    font-size: 0.85rem !important;
}

.footer-column .tagline {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.footer-column .footer-hdr {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    font-weight: 700;
}

.footer-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-list a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-column .no-signup-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    font-size: 0.85rem;
}

.footer-bottom-left {
    color: var(--text-secondary);
}

.footer-bottom-right a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer-bottom-right a:hover {
    color: var(--accent);
}

/* Table styling used in some calculators */
.results-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.results-table th, .results-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.results-table th {
    font-weight: 700;
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.results-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

body.light-theme .results-table tr:hover {
    background: rgba(0, 0, 0, 0.02);
}

/* Special UI styling for things like pass strength, color converter, password generator */
.password-box {
    font-family: monospace;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    margin-bottom: 1rem;
    word-break: break-all;
    user-select: all;
    cursor: pointer;
}

.strength-bar-container {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.strength-bar {
    height: 100%;
    width: 0;
    transition: var(--transition);
}

.strength-weak { background: var(--danger); width: 25%; }
.strength-fair { background: var(--warning); width: 50%; }
.strength-good { background: #3b82f6; width: 75%; }
.strength-strong { background: var(--success); width: 100%; }

.color-preview {
    height: 100px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
}

.gradient-preview {
    height: 180px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.code-output {
    background: var(--bg-primary);
    font-family: monospace;
    padding: 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    cursor: pointer;
}

/* Custom QR code canvas container */
#qr-canvas-container {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
    background: #ffffff;
    padding: 1.5rem;
    border-radius: var(--radius);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

#qr-canvas {
    display: block;
}

/* Amortization schedule toggle */
.schedule-toggle {
    margin-top: 1rem;
}

.schedule-container {
    max-height: 400px;
    overflow-y: auto;
    margin-top: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

/* Font Assignments & Role Styling */
.logo, .home-title, .page-title {
    font-family: 'Black Ops One', system-ui, sans-serif;
}

.logo-icon {
    width: 38px !important;
    font-size: 1rem !important;
    font-family: 'Black Ops One', system-ui, sans-serif;
    letter-spacing: -0.5px;
}

h2, h3, .section-title, .card-title, .home-category-title, .faq-question, .worked-example-card h3 {
    font-family: 'Jura', system-ui, sans-serif;
    font-weight: 700;
}

.result-highlight-value, .results-table td, .worked-example-value, .range-val {
    font-family: 'Work Sans', system-ui, sans-serif;
}

.result-row {
    font-family: 'Work Sans', system-ui, sans-serif;
    font-style: italic;
}

.eyebrow-badge {
    font-family: 'Yuyu', cursive, sans-serif !important;
    letter-spacing: 1px;
}

/* Formula Used Section Styles */
.formula-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-top: 1rem;
}

.formula-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.formula-equation {
    font-family: monospace;
    font-size: 1.05rem;
    padding: 0.85rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--accent);
    margin-bottom: 0.85rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.formula-explanation {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}