/* MusicNumbers.io - Common Styles */


/* CSS Variables */
:root {
    --primary: #5E3AEE;
    --primary-dark: #4A2FBE;
    --success: #10B981;
    --warning: #F59E0B;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --border: #CBD5E1;
    --border-light: #E2E8F0;
}

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

/* Self-hosted Inter Variable font (modern browsers handle variations with woff2) */
@font-face {
    font-family: 'Inter';
    src: url('/fonts/Inter-Variable.woff2') format('woff2');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

/* Using self-hosted Inter variable font; external imports removed due to CSP */

body {
    /* Prefer self-hosted Inter, with system fallbacks */
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 48px;
}

.navbar-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand::before {
    content: '';
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary) 0%, #8B5CF6 100%);
    border-radius: 8px;
}

.navbar-menu {
    display: flex;
    gap: 32px;
}

.navbar-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.navbar-signup {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.navbar-signup:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(94, 58, 238, 0.3);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 40px;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.footer-bottom {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border-light);
}

.footer-copyright {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 14px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(94, 58, 238, 0.3);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 16px;
    transition: border-color 0.2s;
    background: var(--bg-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Cards */
.card {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.calculator-card {
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    background: var(--bg-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-menu {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 16px;
    }
}