/* ==========================================================================
   PRISM VECTOR — Design System & Base
   ========================================================================== */

/* Design Tokens */
:root {
    --color-primary: #0A0F1A;
    --color-accent: #3B82F6;
    --color-accent-hover: #2563EB;
    --color-secondary: #1E293B;
    --color-background: #0F172A;
    --color-surface: #111827;
    --color-border: #1E293B;
    --color-text: #F1F5F9;
    --color-text-muted: #94A3B8;
    --color-text-light: #64748B;
    --color-error: #EF4444;
    --color-success: #10B981;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Space Grotesk', 'Inter', sans-serif;
    --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
    --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
    --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
    --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;
    --radius-sm: 0.375rem; --radius-md: 0.5rem;
    --radius-lg: 0.75rem; --radius-xl: 1rem; --radius-full: 9999px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 20px rgba(59,130,246,0.15);
    --transition-fast: 150ms ease; --transition-base: 250ms ease; --transition-slow: 350ms ease;
    --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;
    --container-max: 1200px;
    --container-padding: var(--space-6);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-body); font-size: var(--text-base);
    line-height: 1.7; color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.2; }
::selection { background: var(--color-accent); color: white; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* Skip Link */
.skip-link {
    position: absolute; top: -100%; left: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--color-accent); color: white;
    border-radius: var(--radius-sm); font-weight: 600; z-index: 10000;
}
.skip-link:focus { top: var(--space-4); }

/* Layout */
.section { padding: var(--space-20) 0; }
.section--alt { background: var(--color-surface); }
.section--dark { background: var(--color-primary); }
.section__inner { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }
.section__title { font-size: var(--text-4xl); font-weight: 700; text-align: center; margin-bottom: var(--space-4); }
.section__title--light { color: white; }
.section__subtitle {
    color: var(--color-text-muted); text-align: center; max-width: 640px;
    margin: 0 auto var(--space-12); font-size: var(--text-lg);
}
.section__subtitle--light { color: var(--color-text-muted); }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; gap: var(--space-2);
    padding: var(--space-3) var(--space-6); font-size: var(--text-sm); font-weight: 600;
    border-radius: var(--radius-md); cursor: pointer; line-height: 1.5;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary {
    background: var(--color-accent); color: white;
    box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}
.btn--primary:hover { background: var(--color-accent-hover); box-shadow: 0 4px 16px rgba(59,130,246,0.4); }
.btn--primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn--outline { border: 1px solid var(--color-border); color: var(--color-text); background: transparent; }
.btn--outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn--large { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }

/* Navigation */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(10,15,26,0.85); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.nav__inner {
    max-width: var(--container-max); margin: 0 auto;
    padding: var(--space-4) var(--container-padding);
    display: flex; align-items: center; justify-content: space-between;
}
.nav__logo { display: flex; align-items: center; gap: var(--space-3); }
.nav__logo-mark { flex-shrink: 0; }
.nav__logo-text { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: 700; letter-spacing: 0.05em; }
.nav__menu { display: flex; align-items: center; gap: var(--space-8); }
.nav__link { font-size: var(--text-sm); color: var(--color-text-muted); transition: color var(--transition-fast); }
.nav__link:hover { color: var(--color-text); }
.nav__cta { padding: var(--space-2) var(--space-5); background: var(--color-accent); color: white; border-radius: var(--radius-sm); font-size: var(--text-sm); font-weight: 600; transition: background var(--transition-fast); }
.nav__cta:hover { background: var(--color-accent-hover); }
.nav__toggle { display: none; flex-direction: column; gap: 5px; padding: var(--space-2); }
.nav__toggle-bar { width: 24px; height: 2px; background: var(--color-text); border-radius: 1px; transition: transform var(--transition-fast), opacity var(--transition-fast); }

/* Hero */
.hero {
    padding: var(--space-24) 0 var(--space-20);
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-background) 100%);
    min-height: 100vh; display: flex; align-items: center;
}
.hero__inner { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); text-align: center; }
.hero__eyebrow { font-size: var(--text-sm); color: var(--color-accent); text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600; margin-bottom: var(--space-4); }
.hero__title { font-size: clamp(2.5rem, 6vw, var(--text-6xl)); font-weight: 700; margin-bottom: var(--space-6); line-height: 1.1; }
.hero__subtitle { font-size: var(--text-xl); color: var(--color-text-muted); max-width: 640px; margin: 0 auto var(--space-8); line-height: 1.6; }
.hero__actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; margin-bottom: var(--space-16); }
.hero__stats { display: flex; justify-content: center; gap: var(--space-12); flex-wrap: wrap; padding-top: var(--space-8); border-top: 1px solid var(--color-border); }
.hero__stat { text-align: center; }
.hero__stat-number { display: block; font-family: var(--font-heading); font-size: var(--text-3xl); font-weight: 700; color: white; }
.hero__stat-label { display: block; font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-1); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-6); }
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); transition: border-color var(--transition-fast), box-shadow var(--transition-fast); }
.card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-glow); }
.card--bordered { background: transparent; }
.card__icon { color: var(--color-accent); margin-bottom: var(--space-4); }
.card__title { font-size: var(--text-xl); margin-bottom: var(--space-3); }
.card__text { color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.7; }

/* Process Steps */
.steps { max-width: 720px; margin: 0 auto; }
.step { padding: var(--space-8); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: border-color var(--transition-fast); }
.step:hover { border-color: var(--color-accent); }
.step__number { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: var(--color-accent); color: white; border-radius: var(--radius-full); font-family: var(--font-heading); font-weight: 700; font-size: var(--text-lg); margin-bottom: var(--space-4); }
.step__title { font-size: var(--text-xl); margin-bottom: var(--space-3); }
.step__text { color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.7; }
.step__connector { width: 2px; height: var(--space-8); background: var(--color-border); margin: 0 auto; }

/* Results */
.metrics { display: flex; justify-content: center; gap: var(--space-12); flex-wrap: wrap; }
.metric { text-align: center; min-width: 140px; }
.metric__number { display: block; font-family: var(--font-heading); font-size: var(--text-4xl); font-weight: 700; color: var(--color-accent); }
.metric__label { display: block; font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-2); }

/* Trust Badges */
.trust__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-6); }
.trust__badge { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-6); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); color: var(--color-accent); font-size: var(--text-sm); font-weight: 500; transition: border-color var(--transition-fast); }
.trust__badge:hover { border-color: var(--color-accent); }
.trust__badge span { color: var(--color-text); }

/* CTA Section */
.cta { background: var(--color-surface); }
.cta__grid { display: grid; grid-template-columns: 1fr 340px; gap: var(--space-12); align-items: start; }
.cta__content .section__title,
.cta__content .section__subtitle { text-align: left; margin-left: 0; }
.cta__form { margin-top: var(--space-8); }
.cta__form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-4); }
.cta__form-group { display: flex; flex-direction: column; gap: var(--space-1); }
.cta__form-group--full { grid-column: 1 / -1; width: 100%; }
.cta__form-group label { font-size: var(--text-sm); font-weight: 500; color: var(--color-text); }
.cta__form-group label span { color: var(--color-accent); }
.cta__form-group input,
.cta__form-group textarea { padding: var(--space-3) var(--space-4); background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--text-sm); transition: border-color var(--transition-fast); }
.cta__form-group input:focus,
.cta__form-group textarea:focus { border-color: var(--color-accent); outline: none; }
.cta__form-group textarea { resize: vertical; min-height: 100px; }
.cta__form .btn { margin-top: var(--space-4); width: 100%; justify-content: center; }
.cta__note { text-align: center; font-size: var(--text-xs); color: var(--color-text-light); margin-top: var(--space-3); }

/* Form States */
.has-error { border-color: var(--color-error) !important; }
.field-error { display: block; margin-top: var(--space-1); font-size: var(--text-xs); color: var(--color-error); }
.form-success { text-align: center; padding: var(--space-8); background: rgba(16,185,129,0.05); border: 1px solid rgba(16,185,129,0.2); border-radius: var(--radius-lg); }
.form-success h3 { color: white; margin: var(--space-4) 0 var(--space-2); font-size: var(--text-2xl); }
.form-success p { color: var(--color-text-muted); font-size: var(--text-sm); }
.form-error { text-align: center; padding: var(--space-4); background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.25); border-radius: var(--radius-lg); color: var(--color-text); font-size: var(--text-sm); margin-bottom: var(--space-4); }

/* CTA Sidebar */
.cta__sidebar { position: sticky; top: 100px; }
.cta__contact-card { background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); margin-bottom: var(--space-4); }
.cta__contact-title { font-size: var(--text-lg); margin-bottom: var(--space-4); }
.cta__contact-item { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) 0; color: var(--color-text-muted); font-size: var(--text-sm); }
.cta__contact-item a { transition: color var(--transition-fast); }
.cta__contact-item a:hover { color: var(--color-accent); }
.cta__guarantee { display: flex; gap: var(--space-4); align-items: flex-start; padding: var(--space-6); background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-lg); color: var(--color-accent); }
.cta__guarantee strong { display: block; color: var(--color-text); margin-bottom: var(--space-1); }
.cta__guarantee p { font-size: var(--text-sm); color: var(--color-text-muted); }

/* Loss Analysis Tool */
.loss-analysis { background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-10); max-width: 760px; margin: 0 auto; }
.loss-analysis__progress { display: flex; gap: var(--space-2); justify-content: center; margin-bottom: var(--space-8); }
.loss-analysis__step-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--color-border); transition: background var(--transition-base); }
.loss-analysis__step-dot--active { background: var(--color-accent); box-shadow: 0 0 8px rgba(59,130,246,0.5); }
.loss-analysis__step-dot--done { background: var(--color-success); }
.loss-analysis__step-title { font-size: var(--text-xs); color: var(--color-text-muted); text-align: center; margin-bottom: var(--space-6); text-transform: uppercase; letter-spacing: 0.1em; }
.loss-analysis__question { font-size: var(--text-xl); font-weight: 600; margin-bottom: var(--space-6); text-align: center; }
.loss-analysis__options { display: grid; gap: var(--space-3); }
.loss-analysis__option { display: flex; align-items: center; padding: var(--space-4); background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-md); cursor: pointer; transition: border-color var(--transition-fast), background var(--transition-fast); }
.loss-analysis__option:hover { border-color: var(--color-accent); }
.loss-analysis__option--selected { border-color: var(--color-accent); background: rgba(59,130,246,0.08); }
.loss-analysis__option input[type="radio"] { display: none; }
.loss-analysis__option label { cursor: pointer; font-size: var(--text-sm); display: flex; align-items: center; gap: var(--space-3); width: 100%; }
.loss-analysis__option label::before { content: ""; width: 18px; height: 18px; border: 2px solid var(--color-border); border-radius: 50%; flex-shrink: 0; transition: border-color var(--transition-fast), background var(--transition-fast); }
.loss-analysis__option--selected label::before { border-color: var(--color-accent); background: var(--color-accent); box-shadow: inset 0 0 0 4px var(--color-background); }
.loss-analysis__checklist { display: grid; gap: var(--space-3); }
.loss-analysis__check { display: flex; align-items: flex-start; gap: var(--space-3); padding: var(--space-4); background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-md); cursor: pointer; transition: border-color var(--transition-fast), background var(--transition-fast); }
.loss-analysis__check:hover { border-color: var(--color-accent); }
.loss-analysis__check--checked { border-color: var(--color-accent); background: rgba(59,130,246,0.08); }
.loss-analysis__check input[type="checkbox"] { display: none; }
.loss-analysis__check label { cursor: pointer; font-size: var(--text-sm); display: flex; align-items: flex-start; gap: var(--space-3); }
.loss-analysis__check label::before { content: ""; width: 18px; height: 18px; border: 2px solid var(--color-border); border-radius: var(--radius-sm); flex-shrink: 0; margin-top: 1px; transition: border-color var(--transition-fast), background var(--transition-fast); }
.loss-analysis__check--checked label::before { border-color: var(--color-accent); background: var(--color-accent); background-size: 12px; background-position: center; background-repeat: no-repeat; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8l4 4 6-8' stroke='white' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.loss-analysis__check-label { font-weight: 500; }
.loss-analysis__check-desc { display: block; font-size: var(--text-xs); color: var(--color-text-light); margin-top: var(--space-1); }
.loss-analysis__actions { display: flex; gap: var(--space-3); justify-content: center; margin-top: var(--space-8); }
.loss-analysis__results { text-align: center; }
.loss-analysis__score { font-family: var(--font-heading); font-size: var(--text-5xl); font-weight: 700; color: var(--color-accent); margin-bottom: var(--space-2); }
.loss-analysis__score-label { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-8); }
.loss-analysis__breakdown { text-align: left; max-width: 560px; margin: 0 auto; }
.loss-analysis__finding { padding: var(--space-4) 0; border-bottom: 1px solid var(--color-border); }
.loss-analysis__finding:last-child { border-bottom: none; }
.loss-analysis__finding-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-2); }
.loss-analysis__finding-label { font-weight: 600; font-size: var(--text-sm); }
.loss-analysis__finding-severity { font-size: var(--text-xs); font-weight: 600; padding: 2px 8px; border-radius: var(--radius-full); }
.loss-analysis__finding-severity--high { background: rgba(239,68,68,0.15); color: #F87171; }
.loss-analysis__finding-severity--medium { background: rgba(245,158,11,0.15); color: #FBBF24; }
.loss-analysis__finding-severity--low { background: rgba(16,185,129,0.15); color: #34D399; }
.loss-analysis__finding-text { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.7; }
.loss-analysis__cta { margin-top: var(--space-8); text-align: center; padding-top: var(--space-6); border-top: 1px solid var(--color-border); }

/* Footer */
.footer { background: var(--color-primary); border-top: 1px solid var(--color-border); padding: var(--space-12) 0 var(--space-6); }
.footer__inner { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); display: flex; justify-content: space-between; gap: var(--space-8); flex-wrap: wrap; }
.footer__brand { max-width: 320px; }
.footer__logo { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: 700; letter-spacing: 0.05em; }
.footer__tagline { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-2); }
.footer__links { display: flex; gap: var(--space-12); flex-wrap: wrap; }
.footer__col { display: flex; flex-direction: column; gap: var(--space-2); }
.footer__col-title { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-1); }
.footer__col a { font-size: var(--text-sm); color: var(--color-text-muted); transition: color var(--transition-fast); }
.footer__col a:hover { color: var(--color-text); }
.footer__bottom { max-width: var(--container-max); margin: var(--space-8) auto 0; padding: var(--space-6) var(--container-padding) 0; border-top: 1px solid var(--color-border); text-align: center; }
.footer__bottom p { font-size: var(--text-sm); color: var(--color-text-light); }

/* Responsive */
@media (max-width: 1024px) {
    .cta__grid { grid-template-columns: 1fr; }
    .cta__sidebar { position: static; }
}
@media (max-width: 768px) {
    :root { --container-padding: var(--space-4); }
    .section { padding: var(--space-12) 0; }
    .section__title { font-size: var(--text-3xl); }
    .nav__menu { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(10,15,26,0.98); border-bottom: 1px solid var(--color-border); padding: var(--space-4) var(--container-padding); flex-direction: column; align-items: stretch; gap: var(--space-3); }
    .nav__menu--open { display: flex; }
    .nav__toggle { display: flex; }
    .nav__toggle--open .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav__toggle--open .nav__toggle-bar:nth-child(2) { opacity: 0; }
    .nav__toggle--open .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .nav__cta { text-align: center; }
    .hero__title { font-size: var(--text-4xl); }
    .hero__subtitle { font-size: var(--text-lg); }
    .hero__stats { gap: var(--space-6); }
    .hero__stat-number { font-size: var(--text-2xl); }
    .cta__form-row { grid-template-columns: 1fr; }
    .metrics { gap: var(--space-6); }
    .metric__number { font-size: var(--text-3xl); }
    .loss-analysis { padding: var(--space-6); }
    .footer__inner { flex-direction: column; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    html { scroll-behavior: auto; }
}

/* Utility */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Case Study */
.case-study__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); align-items: start; }
.case-study__panel { padding: var(--space-8); border-radius: var(--radius-lg); }
.case-study__panel--loss { background: var(--color-primary); border: 1px solid var(--color-border); }
.case-study__panel--fix { background: rgba(59,130,246,0.06); border: 1px solid rgba(59,130,246,0.25); }
.case-study__panel-label { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-3); }
.case-study__panel--fix .case-study__panel-label { color: var(--color-accent); }
.case-study__rule { width: 40px; height: 3px; background: var(--color-accent); border-radius: 2px; margin-bottom: var(--space-6); }
.case-study__context { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.8; margin-bottom: var(--space-4); }
.case-study__context strong { color: var(--color-text); font-weight: 600; }
.case-study__source { font-size: var(--text-xs); color: var(--color-text-light); font-style: italic; margin-top: var(--space-6); padding-top: var(--space-4); border-top: 1px solid var(--color-border); }
@media (max-width: 768px) { .case-study__grid { grid-template-columns: 1fr; } }