/**
 * Rechner.aarg.ar - Shared Styles
 * German Calculator Tools Website
 */

/* ========== CSS Variables ========== */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;

    /* Text */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    /* Borders */
    --border-color: #e2e8f0;
    --border-radius: 8px;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

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

    /* Accent */
    --accent-primary: #2563eb;
    --accent-light: #eff6ff;
}

/* ========== Dark Mode ========== */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;

    --border-color: #334155;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);

    --accent-light: #1e3a5f;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 2.25rem; margin-bottom: var(--space-lg); }
h2 { font-size: 1.75rem; margin-bottom: var(--space-md); }
h3 { font-size: 1.35rem; margin-bottom: var(--space-sm); }
h4 { font-size: 1.15rem; margin-bottom: var(--space-sm); }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

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

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

/* ========== Layout ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.tool-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--space-xl);
}

.tool-content {
    min-width: 0;
}

.tool-sidebar {
    position: sticky;
    top: var(--space-lg);
    height: fit-content;
}

@media (max-width: 900px) {
    .tool-container {
        grid-template-columns: 1fr;
    }

    .tool-sidebar {
        position: static;
        order: -1;
    }
}

/* ========== Header ========== */
.site-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

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

.main-nav {
    display: flex;
    gap: var(--space-lg);
}

.main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.main-nav a:hover {
    color: var(--color-primary);
    background: var(--accent-light);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--text-primary);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

/* ========== Breadcrumb ========== */
.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

/* ========== Tool Intro ========== */
.tool-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

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

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

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.125rem;
}

/* ========== Form Elements ========== */
.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.input-group label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.input-group input,
.input-group select,
.input-group textarea {
    padding: var(--space-sm) var(--space-md);
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

/* ========== Result Box ========== */
.result-box {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--space-lg);
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-box h3 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

/* ========== Detail Grid ========== */
.bmi-detail-grid,
.detail-grid {
    display: grid;
    gap: var(--space-sm);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.detail-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.detail-value {
    font-weight: 600;
    color: var(--text-primary);
}

.detail-item.full-width {
    grid-column: 1 / -1;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
    background: var(--accent-light);
    border-left: 3px solid var(--color-primary);
}

/* ========== Sidebar ========== */
.tool-sidebar h3 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.related-tools {
    list-style: none;
}

.related-tools li {
    margin-bottom: var(--space-xs);
}

.related-tools a {
    display: block;
    padding: var(--space-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.related-tools a:hover {
    background: var(--accent-light);
    color: var(--color-primary);
}

/* ========== Content Sections ========== */
.tool-content-section {
    margin-top: var(--space-xl);
}

.tool-content-section h3 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.tool-content-section ul {
    margin: var(--space-md) 0;
    padding-left: var(--space-lg);
}

.tool-content-section li {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

/* ========== FAQ Section ========== */
.tool-faq {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.tool-faq h2 {
    margin-bottom: var(--space-lg);
}

.faq-item {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
}

.faq-item p,
.faq-item ul {
    color: var(--text-secondary);
}

.faq-item ul {
    margin-top: var(--space-sm);
    padding-left: var(--space-lg);
}

/* ========== Back Link ========== */
.back-link {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

/* ========== Footer ========== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-lg) 0;
    margin-top: var(--space-2xl);
}

.site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.site-footer p {
    color: var(--text-muted);
    margin: 0;
}

.footer-nav {
    display: flex;
    gap: var(--space-lg);
}

.footer-nav a {
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

/* ========== Responsive ========== */
@media (max-width: 768px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .main-nav {
        display: none;
    }

    .tool-intro {
        font-size: 1rem;
    }

    .site-footer .container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }

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

/* ========== Utility Classes ========== */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }