/* --- NEU-BRUTALIST ARCHITECTURAL THEME --- */

:root {
    /* DEFAULT LIGHT AESTHETIC */
    --bg: #F5F5F3;
    --text: #0A0A0C;
    --text-muted: #555555;
    --accent: #D97706;
    --border: #0A0A0C;
    --shadow: #0A0A0C;
    
    --font-head: 'Syne', sans-serif;
    --font-mono: 'Fragment Mono', monospace;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, sans-serif;
    
    --border-width: 2px;
    --box-shadow-offset: 6px;
    --transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-theme="dark"] {
    /* DARK NEU-BRUTALIST */
    --bg: #0A0A0C;
    --text: #E5E7EB;
    --text-muted: #8b92a5;
    --accent: #C27803;
    --border: #E5E7EB;
    --shadow: #C27803;
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
    position: relative;
}

/* BACKGROUND WIREFRAME */
.bg-wireframe {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background-image: 
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.04;
    z-index: -1;
    pointer-events: none;
    transition: transform 0.1s linear;
}
[data-theme="light"] .bg-wireframe { opacity: 0.08; }

/* TYPOGRAPHY */
h1, h2, h3, .brand {
    font-family: var(--font-head);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.5px;
    line-height: 1.1;
}

.mono {
    font-family: var(--font-mono);
}

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

.accent-text {
    color: var(--accent);
}

a {
    color: inherit;
    text-decoration: none;
}

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

.section-padding {
    padding: 100px 0;
}

/* BUTTONS (HEAVY PHYSICAL PHYSICS) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1rem;
    text-transform: uppercase;
    cursor: pointer;
    background: var(--bg);
    color: var(--text);
    border: var(--border-width) solid var(--border);
    box-shadow: 4px 4px 0 var(--shadow);
    transition: transform 0.1s, box-shadow 0.1s, filter 0.1s;
    text-decoration: none;
    min-height: 48px; /* touch friendly */
}

.btn:active {
    transform: translate(3px, 3px);
    box-shadow: 1px 1px 0 var(--shadow);
    filter: invert(10%);
}

.btn-primary {
    background: var(--accent);
    color: #0A0A0C;
    border-color: var(--border);
}

[data-theme="light"] .btn-primary {
    border-color: #0A0A0C;
    box-shadow: 4px 4px 0 #0A0A0C;
}

.btn-massive {
    padding: 20px 40px;
    font-size: 1.2rem;
    box-shadow: 6px 6px 0 var(--shadow);
}
.btn-massive:active {
    transform: translate(5px, 5px);
    box-shadow: 1px 1px 0 var(--shadow);
}

.btn-full { width: 100%; }

.btn-icon {
    padding: 10px;
    background: transparent;
    border: var(--border-width) solid var(--border);
    box-shadow: 2px 2px 0 var(--shadow);
    color: var(--text);
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
}
.btn-icon:active {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0 var(--shadow);
}

/* NAVBAR */
.navbar {
    position: sticky;
    top: 0;
    background: var(--bg);
    border-bottom: var(--border-width) solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.brand {
    font-size: 2rem;
    letter-spacing: -2px;
}

.nav-links {
    display: flex;
    gap: 32px;
    font-size: 0.85rem;
    font-weight: 600;
}

.nav-links a {
    position: relative;
    padding-bottom: 2px;
}

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

.nav-highlight {
    background: var(--accent);
    color: #0A0A0C !important;
    padding: 2px 8px;
    border: 1px solid var(--border);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* HEARTBEAT INDICATOR */
.heartbeat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    border: var(--border-width) solid var(--border);
    padding: 6px 12px;
    box-shadow: 2px 2px 0 var(--shadow);
}

.pulse {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border: 1px solid var(--border);
    animation: blink 1s infinite step-end;
}

@keyframes blink { 
    50% { opacity: 0; } 
}

/* THEME TOGGLE ICONS */
[data-theme="light"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }

/* HERO SECTION */
.hero {
    margin-top: 40px;
}

.headline {
    font-size: 5rem;
    max-width: 900px;
    margin-bottom: 30px;
}

.subtitle {
    font-size: 1.1rem;
    max-width: 700px;
    margin-bottom: 50px;
    line-height: 1.8;
}

/* BENTO STRUCTURAL GRID */
.section-header {
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.bento-box {
    border: var(--border-width) solid var(--border);
    background: var(--bg);
    padding: 32px;
    box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), padding var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.bento-box:hover {
    transform: translate(-2px, -2px) scale(1.01);
    box-shadow: 10px 10px 0 var(--shadow);
    padding-bottom: 48px; /* Grid Expansion Effect */
}

.box-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.box-header h3 {
    font-size: 1.5rem;
}

.bento-specs {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    color: var(--accent);
    margin-top: 0;
    font-size: 0.85rem;
}

.bento-box:hover .bento-specs {
    max-height: 100px;
    opacity: 1;
    margin-top: 20px;
}

/* PACKET SLIDER (INTERACTIVE) */
.packet-scale {
    padding-bottom: 32px !important; /* disable expansion override */
}

.brutal-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 16px;
    background: var(--bg);
    border: var(--border-width) solid var(--border);
    outline: none;
    margin: 24px 0;
}

.brutal-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 48px;
    background: var(--accent);
    border: var(--border-width) solid var(--border);
    cursor: grab;
    box-shadow: 2px 2px 0 var(--shadow);
}
.brutal-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
}

.packet-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: bold;
    flex-wrap: wrap;
    gap: 10px;
}

/* PRICING */
.pricing-box {
    justify-content: space-between;
}

.accent-border {
    border-color: var(--accent);
}

.pricing-list {
    list-style: none;
    margin: 30px 0;
    flex-grow: 1;
}

.pricing-list li {
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.code-drawer {
    border: var(--border-width) dashed var(--border);
    padding: 12px;
    background: rgba(139, 146, 165, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.config-code {
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0.6;
}

.copy-btn {
    padding: 6px 12px;
    font-size: 0.75rem;
    min-height: auto;
}

/* FAQ & REVIEWS */
.border-bottom {
    border-bottom: var(--border-width) solid var(--border);
    padding-bottom: 16px;
}

.faq-item summary {
    font-weight: bold;
    cursor: pointer;
    list-style: none;
    position: relative;
    outline: none;
    padding: 10px 0;
}

.faq-item summary::before {
    content: "[+] ";
    color: var(--accent);
}
.faq-item[open] summary::before {
    content: "[-] ";
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

/* FOOTER */
.border-top {
    border-top: var(--border-width) solid var(--border);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-links {
    display: flex;
    gap: 24px;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* RESPONSIVE DESIGN */
@media (max-width: 1024px) {
    .headline { font-size: 3.5rem; }
    .nav-links { display: none; }
}

@media (max-width: 768px) {
    .headline { font-size: 2.5rem; }
    .subtitle { font-size: 0.95rem; }
    .heartbeat { display: none; }
    
    .bento-grid { grid-template-columns: 1fr; }
    
    .section-padding { padding: 60px 0; }
    
    .footer-grid { flex-direction: column; text-align: center; }
    .footer-links { flex-direction: column; gap: 15px; }
}

/* SUBPAGE STYLES */
.subpage-header {
    padding: 60px 0;
    border-bottom: var(--border-width) solid var(--border);
    margin-bottom: 40px;
}
.subpage-content {
    max-width: 800px;
    margin: 0 auto 100px;
}
.subpage-content h2 {
    margin: 40px 0 20px;
    font-size: 1.8rem;
}
.subpage-content p, .subpage-content ul {
    margin-bottom: 20px;
}
.subpage-content ul {
    padding-left: 20px;
}
.subpage-content li {
    margin-bottom: 10px;
}