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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --text: #1e293b;
    --text-light: #64748b;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e2e8f0;
    --success: #16a34a;
    --radius: 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 -4px rgba(0,0,0,0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

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

header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* === Hero === */
.hero {
    text-align: center;
    padding: 80px 0 60px;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 32px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: background 0.2s, transform 0.1s;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* === Calculator Section === */
.calculator-section {
    padding: 60px 0;
}

.calc-header {
    text-align: center;
    margin-bottom: 40px;
}

.calc-header h2 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.calc-header p {
    color: var(--text-light);
    font-size: 1.05rem;
}

.calculator-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 40px;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.calc-inputs h3,
.calc-results h3 {
    font-size: 1.1rem;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

/* === Input Styles === */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.input-wrapper {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-wrapper .prefix,
.input-wrapper .suffix {
    padding: 10px 12px;
    background: var(--bg-alt);
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
}

.input-wrapper input {
    flex: 1;
    border: none;
    padding: 10px 12px;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    background: transparent;
    min-width: 0;
}

.input-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* === Results === */
.result-card {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 20px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 4px;
}

.result-card.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.result-card.primary .result-label,
.result-card.primary .result-detail {
    color: rgba(255,255,255,0.85);
}

.result-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-light);
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.result-detail {
    width: 100%;
    font-size: 0.8rem;
    color: var(--text-light);
}

.result-breakdown {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.result-breakdown h4 {
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
}

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

.breakdown-row span:first-child {
    color: var(--text-light);
}

.breakdown-row span:last-child {
    font-weight: 600;
}

.rate-tip {
    margin-top: 20px;
    padding: 16px;
    background: #fef3c7;
    border-radius: 8px;
    font-size: 0.85rem;
    color: #92400e;
    line-height: 1.5;
}

/* === Tools Grid === */
.tools-grid-section {
    padding: 80px 0;
    background: var(--bg-alt);
}

.tools-grid-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 8px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 40px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tool-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.2s, transform 0.2s;
    position: relative;
}

.tool-card:not(.coming-soon):hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.tool-card.coming-soon {
    opacity: 0.7;
}

.tool-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.tool-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
}

.tool-status {
    display: inline-block;
    margin-top: 12px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    background: var(--border);
    color: var(--text-light);
}

.tool-status.live {
    background: #dcfce7;
    color: var(--success);
}

/* === Resources === */
.resources-section {
    padding: 80px 0;
}

.resources-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.resource-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.resource-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.resource-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.resource-link {
    display: inline-block;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s;
}

.resource-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.resource-tag {
    display: inline-block;
    padding: 3px 8px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* === CTA Section === */
.cta-section {
    padding: 80px 0;
    background: var(--bg-alt);
    text-align: center;
}

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

.cta-section p {
    color: var(--text-light);
    margin-bottom: 24px;
    font-size: 1.05rem;
}

/* === Footer === */
footer {
    padding: 48px 0 24px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 32px;
}

.footer-brand p {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.footer-links h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    margin-bottom: 12px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* === Responsive === */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .calc-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .calculator-card {
        padding: 24px;
    }

    .tools-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .nav-links {
        gap: 16px;
    }
}