/* ==========================================
   ANAKTANGGA DESIGN SYSTEM
   Modern, Premium Marketing Website
   ========================================== */

/* ==========================================
   CSS CUSTOM PROPERTIES
   ========================================== */
:root {
    /* Brand Colors - Purple/Blue Tech Gradient */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-dark: #5a67d8;
    --primary-light: #7c3aed;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;

    /* Neutral Colors - Dark Theme */
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.08);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-accent: #c7d2fe;

    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 30px rgba(103, 126, 234, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image:
        radial-gradient(at 0% 0%, rgba(103, 126, 234, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.1) 0px, transparent 50%);
    background-attachment: fixed;
    overflow-x: hidden;
}

::selection {
    background: var(--accent-purple);
    color: var(--text-primary);
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: var(--text-5xl);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: var(--text-4xl);
    color: var(--text-primary);
}

h3 {
    font-size: var(--text-3xl);
    color: var(--text-primary);
}

h4 {
    font-size: var(--text-2xl);
    color: var(--text-secondary);
}

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

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

a:hover {
    color: var(--accent-purple);
}

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

.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 30, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(15, 15, 30, 0.95);
    box-shadow: var(--shadow-lg);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
}

.logo {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--text-2xl);
    cursor: pointer;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(103, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: var(--bg-glass-hover);
    border-color: rgba(255, 255, 255, 0.3);
}

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

/* ==========================================
   CARDS - GLASSMORPHISM
   ========================================== */
.card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-8px);
    background: var(--bg-glass-hover);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-highlighted {
    border: 2px solid var(--accent-purple);
    background: linear-gradient(135deg, rgba(103, 126, 234, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    transform: scale(1.05);
}

.card-highlighted .card-badge {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: var(--primary-gradient);
    color: var(--text-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
}

/* ==========================================
   TABLES
   ========================================== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: rgba(103, 126, 234, 0.1);
}

th {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

tbody tr {
    transition: background var(--transition-fast);
}

tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* ==========================================
   FORMS
   ========================================== */
.form-group {
    margin-bottom: var(--space-md);
}

label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
}

input,
textarea,
select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: var(--text-base);
    transition: all var(--transition-base);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.2);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: var(--space-3xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-section h4 {
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-links a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: var(--text-sm);
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    :root {
        --text-5xl: 2.25rem;
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
        --space-3xl: 3rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 15, 30, 0.98);
        flex-direction: column;
        padding: var(--space-md);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: block;
    }

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

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

    .card {
        padding: var(--space-md);
    }
}

/* ==========================================
   HOME PAGE STYLES
   ========================================== */

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--text-4xl);
    font-weight: 800;
    font-family: var(--font-heading);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Comparison Table */
.comparison-table {
    width: 100%;
}

.comparison-table th {
    padding: var(--space-md);
}

.comparison-saas {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.comparison-anaktangga {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

/* Calculator Section */
.calculator-section {
    background: linear-gradient(135deg, rgba(103, 126, 234, 0.05) 0%, rgba(168, 85, 247, 0.05) 100%);
}

.calculator-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.calculator-card {
    padding: var(--space-2xl);
}

.scenario-description {
    padding: var(--space-lg);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent-blue);
    margin-bottom: var(--space-xl);
}

.cost-comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.cost-card {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.cost-saas {
    border-left: 4px solid var(--error);
}

.cost-anaktangga {
    border-left: 4px solid var(--success);
}

.cost-header h4 {
    margin-bottom: var(--space-md);
    font-size: var(--text-lg);
}

.cost-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: var(--space-sm);
}

.cost-breakdown {
    margin: var(--space-md) 0;
}

.year-cost {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xs) 0;
    color: var(--text-muted);
}

.year-cost small {
    font-size: var(--text-xs);
    margin-left: var(--space-xs);
}

.cost-total {
    display: flex;
    justify-content: space-between;
    padding: var(--space-md) 0;
    border-top: 2px solid rgba(255, 255, 255, 0.2);
    margin-top: var(--space-md);
    font-size: var(--text-lg);
}

.saas-total {
    color: var(--error);
}

.anaktangga-total {
    color: var(--success);
}

.savings-highlight {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.savings-amount {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.savings-label {
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

.savings-value {
    font-size: var(--text-5xl);
    font-weight: 800;
    font-family: var(--font-heading);
}

.savings-percentage {
    font-size: var(--text-xl);
    color: var(--success);
    font-weight: 600;
}

.savings-note {
    color: var(--text-secondary);
    font-size: var(--text-base);
}

/* Interactive Calculator */
.calculator-interactive {
    background: linear-gradient(135deg, rgba(103, 126, 234, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
}

.calculator-result {
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-top: var(--space-lg);
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.result-highlight {
    font-size: var(--text-xl);
    padding-top: var(--space-md);
    margin-top: var(--space-md);
    border-top: 2px solid rgba(255, 255, 255, 0.2);
}

/* Features Preview */
.features-preview {
    background: var(--bg-secondary);
}

.feature-icon {
    font-size: var(--text-6xl);
    margin-bottom: var(--space-md);
    text-align: center;
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    text-align: center;
    padding: var(--space-xl);
}

.contact-icon {
    font-size: var(--text-6xl);
    margin-bottom: var(--space-md);
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

.text-center {
    text-align: center;
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mt-xl {
    margin-top: var(--space-xl);
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mb-xl {
    margin-bottom: var(--space-xl);
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.flex {
    display: flex;
    gap: var(--space-md);
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden {
    display: none;
}

/* About Page */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content .card {
    margin-bottom: var(--space-xl);
}

.about-content ul {
    margin-left: var(--space-lg);
    color: var(--text-secondary);
}

.about-content ul li {
    margin-bottom: var(--space-xs);
}

/* Contact Page */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.faq-simple {
    padding-bottom: var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-simple:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.faq-simple h4 {
    color: var(--accent-blue);
    margin-bottom: var(--space-xs);
    font-size: var(--text-lg);
}

.faq-simple p {
    color: var(--text-secondary);
    margin: 0;
}