/* RHEO.work - Custom Design System & Premium Aesthetics Stylesheet */

/* --- CHAPTER 1: Core Design Variables & Tokens --- */
:root {
    /* Fonts */
    --font-primary: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;

    /* Color Palette - Dark Slate & Premium Emerald (Default) */
    --bg-base: #0b0f19;
    --bg-surface: rgba(17, 24, 39, 0.7);
    --bg-surface-hover: rgba(31, 41, 55, 0.8);
    --bg-navbar: rgba(11, 15, 25, 0.75);
    
    --color-primary: #10b981; /* Emerald-500 */
    --color-primary-hover: #34d399; /* Emerald-400 */
    --color-primary-glow: rgba(16, 185, 129, 0.15);
    --color-accent: #8b5cf6; /* Royal Purple */
    --color-accent-blue: #06b6d4; /* Cyber Cyan */
    
    --color-text-primary: #f3f4f6; /* Slate-100 */
    --color-text-secondary: #9ca3af; /* Slate-400 */
    --color-text-muted: #6b7280; /* Slate-500 */
    
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(16, 185, 129, 0.3);
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #8b5cf6 100%);
    --gradient-emerald: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-glow-1: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    --gradient-glow-2: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    
    /* Layout & Shadow Tokens */
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --shadow-premium: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
    --shadow-emerald: 0 0 20px rgba(16, 185, 129, 0.25);
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --glass-blur: blur(16px);
}

/* Light Mode Override Tokens */
body.theme-light {
    --bg-base: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.8);
    --bg-surface-hover: rgba(255, 255, 255, 0.95);
    --bg-navbar: rgba(248, 250, 252, 0.8);
    
    --color-primary: #059669; /* Richer Emerald for accessibility */
    --color-primary-hover: #047857;
    --color-primary-glow: rgba(5, 150, 105, 0.1);
    
    --color-text-primary: #0f172a; /* Slate-900 */
    --color-text-secondary: #475569; /* Slate-600 */
    --color-text-muted: #94a3b8; /* Slate-400 */
    
    --color-border: rgba(15, 23, 42, 0.06);
    --color-border-hover: rgba(5, 150, 105, 0.25);
    
    --gradient-glow-1: radial-gradient(circle, rgba(5, 150, 105, 0.05) 0%, rgba(0, 0, 0, 0) 70%);
    --gradient-glow-2: radial-gradient(circle, rgba(139, 92, 246, 0.05) 0%, rgba(0, 0, 0, 0) 70%);
    --shadow-premium: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
}

/* --- CHAPTER 2: Standard Resets & Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-base);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Custom Selection style */
::selection {
    background-color: var(--color-primary);
    color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

/* Utilities */
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }
.align-end { align-items: flex-end; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.text-center { text-align: center; }
.w-100 { width: 100%; }

.text-emerald { color: var(--color-primary); }
.text-purple { color: var(--color-accent); }
.text-blue { color: var(--color-accent-blue); }

/* --- CHAPTER 3: Ambient Glow & Animation Systems --- */
.glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    transition: var(--transition-smooth);
}

.glow-orb-1 {
    top: -100px;
    left: -200px;
    background: var(--gradient-glow-1);
    animation: floatingOrb 12s infinite alternate ease-in-out;
}

.glow-orb-2 {
    top: 300px;
    right: -200px;
    background: var(--gradient-glow-2);
    animation: floatingOrb 16s infinite alternate-reverse ease-in-out;
}

@keyframes floatingOrb {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(60px, 40px) scale(1.15); }
}

/* --- CHAPTER 4: Component & UI Definitions --- */

/* 4.1 Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    z-index: 100;
    background-color: var(--bg-navbar);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.03em;
    user-select: none;
}

.logo-accent {
    color: var(--color-primary);
    transition: var(--transition-smooth);
}

.logo-dot {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-emerald);
    transition: var(--transition-smooth);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 4.2 Buttons */
.btn {
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--gradient-emerald);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-emerald);
    background: var(--color-primary-hover);
}

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

.btn-secondary {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--color-text-muted);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary-glow);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 0.8rem 1.8rem;
    font-size: 1rem;
    border-radius: var(--border-radius-sm);
}

.btn-icon {
    font-size: 1.2rem;
    transition: var(--transition-smooth);
}

.btn:hover .btn-icon {
    transform: translateX(3px);
}

/* 4.3 Badges */
.badge-container {
    margin-bottom: 1.5rem;
    display: inline-flex;
}

.badge {
    background: var(--color-primary-glow);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.badge-pulse {
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulseGlow 1.8s infinite;
}

@keyframes pulseGlow {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.badge-mini {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #ef4444;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
}

/* --- CHAPTER 5: Layout & Sections --- */

/* 5.1 Hero Section */
.hero-section {
    padding: 160px 0 80px 0;
    position: relative;
    z-index: 1;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: flowGradient 6s infinite alternate ease-in-out;
}

@keyframes flowGradient {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    max-width: 680px;
    margin-bottom: 2.5rem;
    font-weight: 400;
}

/* 5.2 Interactive Preview Dashboard Card */
.preview-card-wrapper {
    margin-top: 5rem;
    width: 100%;
    max-width: 900px;
    perspective: 1000px;
}

.preview-card {
    background: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-premium);
    overflow: hidden;
    text-align: left;
    transition: var(--transition-smooth);
    transform: rotateX(5deg) translateY(0);
}

.preview-card:hover {
    transform: rotateX(0deg) translateY(-8px);
    border-color: var(--color-border-hover);
    box-shadow: 0 20px 50px -10px rgba(16, 185, 129, 0.15);
}

.preview-header {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background-color: #ef4444; }
.dot.yellow { background-color: #f59e0b; }
.dot.green { background-color: #10b981; }

.preview-title {
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-primary);
}

.status-text {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.preview-body {
    padding: 2rem;
}

.grid-3-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 1.2rem;
    transition: var(--transition-smooth);
}

.metric-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--color-border-hover);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.metric-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.metric-sub {
    font-size: 0.72rem;
    font-weight: 600;
}

.progress-bar-container {
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    margin-top: 1rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
    transition: width 1s ease-in-out;
}

.progress-bar.purple { background-color: var(--color-accent); }
.progress-bar.blue { background-color: var(--color-accent-blue); }

.preview-chart-box {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
}

.chart-header {
    margin-bottom: 1.5rem;
}

.chart-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.bar-chart-container {
    height: 120px;
    padding-top: 10px;
}

.bar {
    width: 7%;
    background: linear-gradient(180deg, var(--color-primary-glow) 0%, rgba(16, 185, 129, 0.6) 100%);
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
    transition: var(--transition-smooth);
}

.bar:hover {
    background: var(--gradient-emerald);
}

.bar.animate-pulse {
    animation: barPulse 2s infinite alternate ease-in-out;
}

@keyframes barPulse {
    0% { filter: brightness(1); }
    100% { filter: brightness(1.3) drop-shadow(0 0 8px var(--color-primary)); }
}

/* Footer Section */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--color-border);
    background: rgba(0, 0, 0, 0.1);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

/* --- CHAPTER 6: Responsive Rules (PWA Friendly) --- */
@media (max-width: 992px) {
    .hero-title {
        font-size: 3.2rem;
    }
    
    .grid-3-col {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        height: 70px;
    }
    
    .nav-links {
        display: none; /* Mobile side-nav can be toggled */
    }
    
    .hero-section {
        padding-top: 130px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .grid-3-col {
        grid-template-columns: 1fr;
    }
    
    .preview-card-wrapper {
        margin-top: 3.5rem;
    }
    
    .preview-body {
        padding: 1.2rem;
    }
}

/* --- CHAPTER 7: RHEO Letters, Bento Grid, ROI Calculator & Dashboard Layouts --- */

/* 7.1 RHEO Letters Interactive Showcase */
.letter-btn-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.letter-btn {
    flex: 1;
    background: var(--bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 1.5rem 0;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    justify-content: center;
    align-items: center;
}

.letter-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.letter-text {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    opacity: 0.4;
    transition: var(--transition-smooth);
    color: var(--color-text-primary);
}

.letter-btn:hover .letter-text,
.letter-text.active-letter {
    opacity: 1;
    color: var(--color-primary);
    text-shadow: 0 0 15px var(--color-primary-glow);
}

.def-box-container {
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.def-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.def-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
}

/* Fade-in Animation */
.fade-in-up {
    animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 7.2 Bento Grid Layout */
.bento-section {
    padding: 80px 0;
    background: rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
}

.bento-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.bento-title-group h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.bento-title-group p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-top: 0.25rem;
}

.bento-badge-group {
    display: flex;
    gap: 0.75rem;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--bento-gap, 20px);
}

.col-span-12 { grid-column: span 12; }
.col-span-8 { grid-column: span 8; }
.col-span-7 { grid-column: span 7; }
.col-span-6 { grid-column: span 6; }
.col-span-5 { grid-column: span 5; }
.col-span-4 { grid-column: span 4; }
.col-span-3 { grid-column: span 3; }

/* Bento Cards */
.bento-card {
    background: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-smooth);
}

.bento-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-premium), 0 10px 30px rgba(16, 185, 129, 0.05);
}

.bento-card.border-dashed-card {
    border-style: dashed;
}

.bento-card.border-dashed-card:hover {
    border-style: solid;
}

.bento-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.bento-icon-wrapper {
    background: var(--color-primary-glow);
    color: var(--color-primary);
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.bento-icon-wrapper.purple-icon {
    background: rgba(139, 92, 246, 0.1);
    color: var(--color-accent);
}

.bento-icon-wrapper.amber-icon {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.bento-card-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.bento-card-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Background Icons Decor */
.bento-card-decor {
    position: absolute;
    bottom: -1.5rem;
    right: -1.5rem;
    opacity: 0.03;
    font-size: 10rem !important;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.bento-card:hover .bento-card-decor {
    opacity: 0.08;
    transform: scale(1.05) rotate(-3deg);
}

/* Gauge styling */
.gauge-wrapper {
    position: relative;
    width: 140px;
    height: 140px;
}

.gauge-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.04);
    stroke-width: 10;
}

.gauge-fill {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 10;
    stroke-linecap: round;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.gauge-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.gauge-val {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1;
}

.gauge-lbl {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    text-transform: uppercase;
    margin-top: 2px;
}

/* Mini Bar Chart styling */
.mini-chart-bar-container {
    height: 60px;
    display: flex;
    align-items: flex-end;
    gap: 4px;
    margin-top: 10px;
}

.mini-bar {
    flex: 1;
    background: rgba(16, 185, 129, 0.2);
    border-top-left-radius: 2px;
    border-top-right-radius: 2px;
    transition: height 0.6s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s;
}

.mini-bar.active {
    background: var(--color-primary);
}

/* 7.3 ROI Calculator Section & Inputs */
.calculator-section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.calculator-card {
    background: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 2px solid rgba(16, 185, 129, 0.15);
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    max-width: 960px;
    margin: 0 auto;
    box-shadow: var(--shadow-premium), 0 0 40px rgba(16, 185, 129, 0.03);
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.slider-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slider-label {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.slider-val {
    font-family: monospace;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

/* Squeaky clean ranges */
input[type=range].premium-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    outline: none;
    transition: background 0.3s;
}

input[type=range].premium-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
    transition: transform 0.1s, background 0.3s;
}

input[type=range].premium-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--color-primary-hover);
}

/* Calculator Result Cards */
.calc-results {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.calc-result-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.calc-result-card.accent-bg {
    background: var(--color-primary-glow);
    border-color: rgba(16, 185, 129, 0.2);
}

.calc-result-value {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--color-text-primary);
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.calc-result-card.accent-bg .calc-result-value {
    color: var(--color-primary);
}

.calc-result-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

/* 7.4 Dashboard Console Layout (for dashboard.html) */
.dashboard-wrapper {
    display: flex;
    min-height: 100vh;
    background: #060a13;
    color: var(--color-text-primary);
    position: relative;
    overflow-x: hidden;
}

/* Sidebar */
.dashboard-sidebar {
    width: 280px;
    background: #0a0e1a;
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 90;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-brand {
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo-img {
    width: 2.2rem;
    height: 2.2rem;
    object-fit: contain;
}

.sidebar-brand-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    text-decoration: none;
}

.sidebar-brand-name span {
    color: var(--color-primary);
}

.sidebar-menu {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow-y: auto;
}

.menu-section-header {
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    text-transform: uppercase;
    padding: 1rem;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.02);
    color: var(--color-text-primary);
}

.menu-item.active {
    background: var(--color-primary-glow);
    color: var(--color-primary);
    border-left: 3px solid var(--color-primary);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.menu-item .material-symbols-outlined {
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.live-ops-box {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.15);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
}

.live-ops-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.live-ops-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: livePulse 1.5s infinite;
}

@keyframes livePulse {
    0% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.6; }
}

.live-ops-text {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    text-transform: uppercase;
}

.live-ops-sub {
    font-size: 0.65rem;
    font-family: monospace;
    color: var(--color-text-muted);
}

/* Main Content Area */
.dashboard-main {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: var(--transition-smooth);
}

.dashboard-header {
    height: 80px;
    padding: 0 3rem;
    border-bottom: 1px solid var(--color-border);
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 80;
}

.dashboard-header-title h1 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.dashboard-header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-latency-box {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.latency-lbl {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.latency-val {
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--color-primary);
}

.dashboard-body {
    padding: 3rem;
    flex: 1;
}

/* System Terminal Box */
.terminal-window {
    background: #030712;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.8rem;
    color: #10B981;
    overflow: hidden;
    margin-top: 1.5rem;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.8);
}

.terminal-header {
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.terminal-controls {
    display: flex;
    gap: 6px;
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}

.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #f59e0b; }
.terminal-dot.green { background: #10b981; }

.terminal-title {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 700;
}

.terminal-body {
    padding: 1rem;
    height: 140px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.terminal-line {
    line-height: 1.4;
    opacity: 0.85;
}

.terminal-line.success {
    color: #34d399;
}

.terminal-line.info {
    color: #60a5fa;
}

.terminal-line.warning {
    color: #fbbf24;
}

/* Mobile Sidebar Toggle Button */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle span {
    font-size: 2rem;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .dashboard-sidebar {
        transform: translateX(-100%);
    }
    
    .dashboard-sidebar.sidebar-open {
        transform: translateX(0);
    }
    
    .dashboard-main {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: flex;
    }
    
    .dashboard-header {
        padding: 0 1.5rem;
    }
    
    .dashboard-body {
        padding: 1.5rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .calculator-card {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .col-span-12, .col-span-8, .col-span-7, .col-span-6, .col-span-5, .col-span-4, .col-span-3 {
        grid-column: span 12;
    }
    
    .letter-btn-container {
        flex-wrap: wrap;
    }
    
    .letter-btn {
        padding: 1rem 0;
    }
    
    .letter-text {
        font-size: 2.2rem;
    }
}

/* --- CHAPTER 8: Under Construction Screen --- */
.minimal-navbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 10;
    padding: 1.5rem 0;
}

.construction-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 6rem 2rem 3rem 2rem;
    position: relative;
    overflow: hidden;
}

.construction-card {
    background: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 4rem 3rem;
    max-width: 680px;
    width: 100%;
    box-shadow: var(--shadow-premium);
    z-index: 2;
    transition: var(--transition-smooth);
    animation: cardEntrance 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.construction-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 15px 50px -10px rgba(0, 0, 0, 0.6), var(--color-primary-glow);
}

.construction-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.construction-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 540px;
    margin: 0 auto 2.5rem auto;
    line-height: 1.6;
}

/* Email Notify Form style */
.notify-form {
    max-width: 500px;
    margin: 0 auto;
}

.notify-form .input-group {
    position: relative;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 0.35rem;
    transition: var(--transition-smooth);
}

.notify-form .input-group:focus-within {
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.input-icon {
    position: absolute;
    left: 1.25rem;
    color: var(--color-text-muted);
    pointer-events: none;
    transition: var(--transition-smooth);
}

.notify-form .input-group:focus-within .input-icon {
    color: var(--color-primary);
}

.premium-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    padding: 0.8rem 1rem 0.8rem 3rem;
    width: 100%;
}

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

.notify-form .btn-primary {
    padding: 0.8rem 1.5rem;
    border-radius: calc(var(--border-radius-md) - 4px);
    font-weight: 600;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 2.5rem 0;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--color-border);
}

.divider:not(:empty)::before {
    margin-right: 1.5rem;
}

.divider:not(:empty)::after {
    margin-left: 1.5rem;
}

/* Primary CTA to dashboard */
.launch-console-btn {
    width: 100%;
    max-width: 420px;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-md);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
    box-shadow: var(--shadow-emerald);
}

/* Animated success feedback */
.form-feedback {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    margin-top: 1.25rem;
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    animation: fadeInUp 0.4s ease forwards;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #34d399;
}

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsiveness overrides */
@media (max-width: 640px) {
    .construction-card {
        padding: 2.5rem 1.5rem;
    }
    .construction-title {
        font-size: 2.2rem;
    }
    .notify-form .input-group {
        flex-direction: column;
        background: none;
        border: none;
        padding: 0;
        gap: 1rem;
    }
    .notify-form .input-group:focus-within {
        box-shadow: none;
    }
    .premium-input {
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid var(--color-border);
        border-radius: var(--border-radius-md);
        padding: 1rem 1rem 1rem 3rem;
    }
    .premium-input:focus {
        border-color: var(--color-primary);
        background: rgba(255, 255, 255, 0.05);
        box-shadow: 0 0 0 3px var(--color-primary-glow);
    }
    .input-icon {
        top: 1.15rem;
    }
    .notify-form .btn-primary {
        width: 100%;
        padding: 1rem;
        border-radius: var(--border-radius-md);
        justify-content: center;
    }
}