@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

/* Reset and Global Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Obsidian Dark Theme Variables (Default) */
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --bg-navbar: rgba(17, 24, 39, 0.75);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 24px rgba(99, 102, 241, 0.15);
    
    --accent-solid: #6366f1;
    --accent: linear-gradient(135deg, #6366f1, #8b5cf6);
    --accent-glow: rgba(99, 102, 241, 0.3);
    --accent-light: rgba(99, 102, 241, 0.08);
    
    --success: #10b981;
    --success-light: rgba(16, 185, 129, 0.08);
    
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition-speed: 0.3s;
}

body.light-theme {
    /* Sophisticated Light Theme Variables */
    --bg-primary: #f3f4f6;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f9fafb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --bg-navbar: rgba(255, 255, 255, 0.75);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-glow: 0 0 24px rgba(79, 70, 229, 0.08);
    
    --accent-solid: #4f46e5;
    --accent: linear-gradient(135deg, #4f46e5, #7c3aed);
    --accent-glow: rgba(79, 70, 229, 0.2);
    --accent-light: rgba(79, 70, 229, 0.05);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
}

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

a:hover {
    filter: brightness(1.2);
}

/* Shared Layout Components */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    background: var(--bg-navbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.nav-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    border-color: var(--border-hover);
    transform: scale(1.05);
}

.theme-toggle-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.sun-icon {
    display: none;
}

body.light-theme .moon-icon {
    display: none;
}

body.light-theme .sun-icon {
    display: block;
}

/* Adsense Styling to prevent CLS */
.adsense-wrapper {
    margin: 1.5rem auto;
    text-align: center;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.adsense-wrapper::before {
    content: "ADVERTISEMENT";
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 0.35rem;
}

.ads-box {
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: 100%;
    transition: all var(--transition-speed) ease;
}

/* Specific standard dimensions */
.ads-leaderboard {
    max-width: 728px;
    height: 90px;
}

.ads-native-mid {
    max-width: 600px;
    height: 120px;
    border-radius: 12px;
}

.ads-anchor {
    max-width: 728px;
    height: 90px;
}

@media (max-width: 768px) {
    .ads-leaderboard {
        max-width: 320px;
        height: 100px;
    }
    .ads-anchor {
        max-width: 320px;
        height: 100px;
    }
}

/* Primary Glassmorphic Cards & Grid System */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    width: 100%;
    flex-grow: 1;
}

.container-narrow {
    max-width: 640px;
}

.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
    background: var(--accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Main Grid Layout */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
    line-height: 1.6;
}

/* Forms & UI Controls */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-input, .form-select {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    outline: none;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.form-input:focus, .form-select:focus {
    border-color: var(--accent-solid);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.grid-cols-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Custom Select Dropdowns */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239ca3af'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
    cursor: pointer;
}

body.light-theme .form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%234b5563'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
}

/* Tab Switching Layout */
.tab-container {
    display: flex;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.25rem;
    border-radius: 10px;
    margin-bottom: 1.25rem;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 0.6rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

/* Button UI */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    background: var(--accent);
    color: #ffffff;
    font-weight: 700;
    font-size: 1rem;
    font-family: var(--font-heading);
    padding: 0.9rem 1.5rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--accent-light);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--accent-glow);
}

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

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

.btn-secondary:hover {
    border-color: var(--border-hover);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
}

/* Calculator Specific Styling Override Classes */
.theme-emerald {
    --accent-solid: #10b981;
    --accent: linear-gradient(135deg, #10b981, #059669);
    --accent-glow: rgba(16, 185, 129, 0.25);
    --accent-light: rgba(16, 185, 129, 0.08);
}

/* Dynamic Results Panel */
.results-panel {
    background: var(--accent-light);
    border: 1px solid var(--accent-glow);
    border-radius: 12px;
    padding: 1.25rem;
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    animation: slideUp 0.3s ease-out;
}

.results-panel.hidden {
    display: none !important;
}

.result-card {
    text-align: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.85rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.result-label {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--accent-solid);
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.result-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-primary);
}

/* Premium Offer Box (Special layout matching gumroad upsell) */
.premium-upsell-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--accent-light) 100%);
    border: 1px solid var(--accent-glow);
    position: relative;
}

.premium-upsell-card::before {
    display: none; /* remove top gradient bar for complex gradient bg */
}

.badge-premium {
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    background: var(--accent-solid);
    color: white;
    font-size: 0.65rem;
    font-weight: 800;
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* SOP Documents Download Layout */
.sop-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.sop-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.sop-item:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: translateX(4px);
}

.sop-icon {
    font-size: 1rem;
    opacity: 0.7;
}

/* Footer Section */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 1.5rem;
    text-align: center;
    background: var(--bg-secondary);
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
    margin-top: auto;
}

.footer p {
    margin-bottom: 0.5rem;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1rem;
}

.footer-nav a {
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hidden {
    display: none !important;
}

/* Utility Helpers */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }

/* Grid columns gap responsiveness */
@media (max-width: 600px) {
    .grid-cols-2 {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}