/* ================================================
   CalcWithMe - Clean, Fast, Professional Stylesheet
   ================================================ */

/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --accent: #f59e0b;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --text-white: #f8fafc;
    --border: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px 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);
    --max-width: 1200px;
    --header-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ================================================
   HEADER
   ================================================ */
header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

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

.logo-icon {
    font-size: 1.5rem;
}

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

nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
}

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

/* ================================================
   HERO SECTION
   ================================================ */
.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 80px 0 60px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-sub {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

/* ================================================
   BUTTONS
   ================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--bg-alt);
    color: var(--text);
    transform: translateY(-1px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* ================================================
   CALCULATORS SECTION
   ================================================ */
.calculators {
    padding: 80px 0;
    background: var(--bg);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text);
}

.section-sub {
    text-align: center;
    color: var(--text-light);
    font-size: 1.05rem;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.calc-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--text);
    position: relative;
}

.calc-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    color: var(--text);
}

.calc-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.calc-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

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

.calc-tag {
    display: inline-block;
    margin-top: 12px;
    padding: 4px 10px;
    background: #dbeafe;
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
}

.calc-tag.hot {
    background: #fef3c7;
    color: #92400e;
}

/* ================================================
   WHY US SECTION
   ================================================ */
.why-us {
    padding: 80px 0;
    background: var(--bg-alt);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.feature {
    text-align: center;
    padding: 24px;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ================================================
   CTA SECTION
   ================================================ */
.cta-section {
    padding: 80px 0;
    background: var(--primary);
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-section .btn-primary {
    background: white;
    color: var(--primary);
}

.cta-section .btn-primary:hover {
    background: #f8fafc;
    color: var(--primary-dark);
}

/* ================================================
   FOOTER
   ================================================ */
footer {
    background: var(--bg-dark);
    color: #94a3b8;
    padding: 60px 0 30px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: white;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: #64748b;
    margin-top: 8px;
}

.footer-links h4 {
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    font-size: 0.875rem;
    color: #94a3b8;
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 24px;
    font-size: 0.85rem;
}

.footer-bottom p {
    color: #64748b;
}

.disclaimer {
    margin-top: 8px;
    font-size: 0.8rem !important;
}

/* ================================================
   CALCULATOR PAGE SPECIFIC
   ================================================ */
.calculator-page {
    padding: 60px 0;
}

.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: start;
}

.calculator-main h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.calculator-main .page-desc {
    color: var(--text-light);
    font-size: 1.05rem;
    margin-bottom: 32px;
    line-height: 1.7;
}

/* Form Styles */
.calc-form {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: var(--text);
}

.form-group .help-text {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.input-wrapper {
    position: relative;
}

.input-prefix {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 0.9rem;
}

.input-suffix {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 0.85rem;
}

input[type="number"],
input[type="text"],
select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: white;
}

input.has-prefix {
    padding-left: 30px;
}

input.has-suffix {
    padding-right: 50px;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.btn-calculate {
    width: 100%;
    padding: 16px;
    font-size: 1.05rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
}

.btn-calculate:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-calculate:active {
    transform: translateY(0);
}

/* Results Panel */
.results-panel {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: sticky;
    top: calc(var(--header-height) + 20px);
}

.results-panel h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.result-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.result-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.result-value.secondary {
    font-size: 1.25rem;
    color: var(--text);
}

.result-note {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* Results Breakdown Table */
.results-breakdown {
    margin-top: 24px;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

.breakdown-row:last-child {
    border-bottom: none;
    font-weight: 600;
    color: var(--text);
}

/* Ad placeholder */
.ad-container {
    background: #f1f5f9;
    border: 1px dashed #cbd5e1;
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    margin: 24px 0;
    font-size: 0.85rem;
    color: #94a3b8;
}

/* Content section for calculator pages */
.calc-content {
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--border);
}

.calc-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.calc-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.calc-content ul {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.calc-content ul li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-light);
    line-height: 1.6;
}

.calc-content ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

/* Related calculators */
.related-calcs {
    margin-top: 32px;
    padding: 24px;
    background: #eff6ff;
    border-radius: var(--radius-lg);
}

.related-calcs h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.related-calcs a {
    display: block;
    padding: 6px 0;
    font-size: 0.9rem;
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 900px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .results-panel {
        position: static;
        order: -1;
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 640px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-num {
        font-size: 1.5rem;
    }

    nav {
        gap: 16px;
    }

    nav a {
        font-size: 0.85rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

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