html {
    scroll-behavior: smooth;
    color-scheme: dark;
}

html[data-theme="dark"] {
    --bg: #0c1220;
    --surface: #111a2a;
    --text: #f3f6ff;
    --muted: rgba(243, 246, 255, 0.74);
    --gray-dollar: rgba(186, 198, 220, 0.72);
    --line: rgba(186, 198, 220, 0.14);
    --line-strong: rgba(74, 222, 128, 0.52);
    --header-bg: rgba(12, 18, 32, 0.93);
    
    --accent: #4ade80;
    --accent-dim: rgba(74, 222, 128, 0.16);
    --accent-soft: rgba(74, 222, 128, 0.22);

    --font-sans: "Inter", system-ui, sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, monospace;
    --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html[data-theme="light"] {
    --bg: #ffffff;
    --surface: #f8fafc;
    --text: #0f172a;
    --muted: #64748b;
    --gray-dollar: #94a3b8;
    --line: #e2e8f0;
    --line-strong: rgba(22, 163, 74, 0.3);
    --header-bg: rgba(255, 255, 255, 0.93);
    
    --accent: #16a34a;
    --accent-dim: rgba(22, 163, 74, 0.1);
    --accent-soft: rgba(22, 163, 74, 0.15);
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 15px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Header */
header {
    position: sticky;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 0.75rem clamp(1rem, 3vw, 2rem);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 0.5rem;
    text-align: center;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}

.logo-wrap {
    display: flex; align-items: center; justify-content: center; gap: 0.75rem;
    font-family: var(--font-mono); font-size: 1.4rem; font-weight: 300;
    letter-spacing: 0.22em; text-transform: uppercase; color: var(--text);
    cursor: pointer;
}
.logo-icon {
    height: 1.8rem;
    width: auto;
    filter: grayscale(1);
    transition: filter 0.3s var(--ease);
}
.logo-wrap:hover .logo-icon {
    filter: grayscale(0);
}
.logo-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
}
.logo-part.accent { color: var(--accent); }

#theme-toggle {
    background: none; border: none; cursor: pointer; padding: 0 0.3em; outline: none;
    font-size: 1rem; color: var(--text); transition: transform 0.2s, opacity 0.2s;
    display: flex; align-items: center; justify-content: center;
    filter: grayscale(1) brightness(2);
    margin-top: -0.1rem; 
    margin-left: -0.15em; /* Counteract letter-spacing from 'KAPRIKA' */
}
html[data-theme="light"] #theme-toggle {
    filter: grayscale(1) brightness(0);
}
#theme-toggle:hover { opacity: 0.7; transform: scale(1.15); }

nav ul {
    margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; justify-content: center;
}
nav a {
    font-family: var(--font-mono); font-size: 0.6rem; font-weight: 300;
    letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); text-decoration: none;
}
nav a:hover { color: var(--text); text-decoration: none; }

/* Utilities */
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2.25rem); }
.container-narrow { max-width: 960px; }
.text-center { text-align: center; }

/* Typography */
.kicker {
    font-family: var(--font-mono); font-size: 0.6rem; font-weight: 300;
    letter-spacing: 0.24em; text-transform: uppercase; color: var(--accent);
    margin: 0 auto 0.75rem; max-width: 40rem; display: block;
}

h1, h2 { font-family: var(--font-sans); font-weight: 500; font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.02em; line-height: 1.25; margin: 0 auto 0.75rem; }
h3 { font-family: var(--font-sans); font-weight: 400; font-size: 1.15rem; margin: 1.5rem 0 0.5rem; letter-spacing: 0.02em; }

.lead { font-size: 1.15rem; color: var(--muted); margin: 0 auto 1.25rem; max-width: 42rem; }
p { color: var(--muted); margin-bottom: 0.85rem; }

/* Buttons */
.action-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.65rem 1.15rem; font-size: 0.8rem; font-family: var(--font-mono); font-weight: 500;
    letter-spacing: 0.05em; color: var(--text); background-color: transparent;
    border: 1px solid var(--line-strong); border-radius: 4px; transition: all 0.3s var(--ease); outline: none; cursor: pointer;
}
.action-btn:hover { background-color: var(--accent-dim); border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-primary { background-color: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

/* Layout / Grids */
.section { padding: 3.5rem 0; }
.section-header { text-align: center; margin-bottom: 2.5rem; padding-top: 1.5rem;}
.hero-section { display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; position: relative; padding: 4rem 0 3.5rem; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; margin-top: 2rem; }

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
    background: var(--surface); border: 1px solid var(--line); padding: 2rem; border-radius: 4px; transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }

.card:hover { border-color: var(--accent); transform: translateY(-2px); }

/* Web3 Widget Components */
.web3-input {
    width: 100%; padding: 0.85rem; margin: 0.5rem 0 1.5rem;
    background: var(--bg); border: 1px solid var(--line);
    color: var(--text); font-family: var(--font-mono); font-size: 0.9rem;
    border-radius: 4px; outline: none; transition: border-color 0.3s var(--ease);
}
.web3-input:focus { border-color: var(--accent); }

.web3-label {
    display: block; font-family: var(--font-mono); font-size: 0.65rem;
    text-transform: uppercase; color: var(--gray-dollar); letter-spacing: 0.1em;
}

.status-msg {
    margin-top: 1rem; font-family: var(--font-mono); font-size: 0.75rem;
    color: var(--accent); opacity: 0.8; min-height: 1.2rem;
}

/* Dashboard Numbers */
.metric-val { font-family: var(--font-mono); font-size: 2.5rem; color: var(--accent); font-weight: 500; margin-bottom: 0.5rem; }
.metric-lbl { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--gray-dollar); }

/* ROI Calculator Components */
.calc-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.calc-inputs { display: flex; flex-direction: column; gap: 1.5rem; }
.input-row { display: flex; flex-direction: column; gap: 0.5rem; }
.input-row label { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; color: var(--gray-dollar); }
.input-row .val { color: var(--accent); font-weight: 500; }
input[type="range"] { -webkit-appearance: none; width: 100%; height: 2px; background: var(--line); outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: var(--accent); cursor: pointer; transition: transform 0.2s; }
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.calc-outputs { background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 2rem; }
.calc-total { padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); margin-bottom: 1.5rem; }
.calc-total:last-child { border: none; padding-bottom: 0; margin-bottom: 0; }
.calc-total .lbl { font-family: var(--font-mono); font-size: 0.75rem; color: var(--gray-dollar); text-transform: uppercase; margin-bottom: 0.5rem; }
.calc-total .val { font-family: var(--font-mono); font-size: 2.5rem; color: var(--text); }

/* Timeline */
.timeline-wrap { max-width: 800px; margin: 0 auto; position: relative; border-left: 1px solid var(--line); padding-left: 2rem; }
.timeline-step { position: relative; margin-bottom: 2.5rem; }
.timeline-step:last-child { margin-bottom: 0; }
.t-marker { position: absolute; left: -2.35rem; top: 0; width: 0.7rem; height: 0.7rem; background: var(--bg); border: 1px solid var(--accent); border-radius: 50%; }
.t-content h4 { margin: 0 0 0.5rem 0; font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; }

/* Data Bars */
.bar-chart { display: flex; flex-direction: column; gap: 1rem; margin-top: 1.5rem; }
.bar-row { display: flex; flex-direction: column; gap: 0.5rem; }
.bar-label { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text); }
.bar-track { width: 100%; height: 6px; background: var(--bg); overflow: hidden; border-radius: 2px; }
.bar-fill { height: 100%; background: var(--accent); width: 0%; transition: width 1.5s var(--ease); }

/* Custom Lists */
.stat-list { list-style: none; padding: 0; margin: 1.5rem 0 0 0; }
.stat-list li { display: flex; justify-content: space-between; padding: 0.75rem 0; border-bottom: 1px solid var(--line); font-size: 0.9rem; }
.stat-list li:last-child { border: none; }
.stat-list .val { font-family: var(--font-mono); color: var(--accent); }

/* Segments Styling */
.segment-wrap {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
}
.segment-tag {
    font-family: var(--font-mono); font-size: 0.65rem; color: var(--gray-dollar);
    padding: 0.4rem 0.6rem; border: 1px solid var(--line); border-radius: 3px;
    text-transform: uppercase; letter-spacing: 0.05em; transition: all 0.3s var(--ease);
}
.segment-tag.active {
    color: var(--bg); background: var(--accent); border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-dim);
}

/* Animations - NOTE: script.js uses .visible !!! */
.reveal { opacity: 0; transform: translateY(20px); transition: all 0.6s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
    .grid-2, .calc-layout { grid-template-columns: 1fr; }
}

footer {
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--line);
    background: var(--surface);
}