/* =========================================================================
   SolarProforma — main stylesheet
   Hand-authored reconstruction of the solarproforma.ai (Tailwind + shadcn/ui)
   design system. Navy + gold + emerald on white, Inter typography.
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. Design tokens
   ------------------------------------------------------------------------- */
:root {
	/* Brand palette (from the source CSS HSL vars, converted to hex) */
	--sp-navy:        #0f1b2d; /* --foreground / --primary (measured) */
	--sp-navy-700:    #16283c;
	--sp-navy-600:    #1e344c;
	--sp-gold:        #e8a838; /* --accent / --ring (measured button bg) */
	--sp-gold-600:    #d8952a;
	--sp-gold-050:    #fdf5e6;
	--sp-emerald:     #1aab8b; /* --success (measured calc value) */
	--sp-emerald-050: #e7f7f1;
	--sp-steel:       #7b8798; /* --steel */
	--sp-purple:      #7c6fd1; /* chart-4 */
	--sp-blue:        #199fe6; /* chart-5 */

	--sp-bg:          #ffffff; /* --background */
	--sp-card:        #ffffff; /* --card */
	--sp-muted:       #f1f4f7; /* --muted */
	--sp-muted-2:     #f9fafb; /* gray-50 section bg (measured) */
	--sp-fg:          #0f1b2d; /* --foreground (measured) */
	--sp-navy-footer: #0c1624; /* footer bg (measured) */
	--sp-nav-fg:      #334f6f; /* header nav links (measured) */
	--sp-body:        #4b5563; /* paragraph / lead copy (measured gray-600) */
	--sp-muted-fg:    #6b747e; /* small labels / notes */
	--sp-border:      #e5e7eb; /* --border (measured card border) */
	--sp-border-2:    #eef1f4;
	--sp-destructive: #ef4444;

	/* Typography */
	--sp-font:  "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	--sp-mono:  ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

	/* Radius */
	--sp-radius:    0.5rem;
	--sp-radius-lg: 1rem;    /* cards ~16px */
	--sp-radius-xl: 1.25rem;

	/* Shadows */
	--sp-shadow-sm: 0 1px 2px rgba(15, 29, 46, 0.06);
	--sp-shadow:    0 4px 12px rgba(15, 29, 46, 0.08);
	--sp-shadow-lg: 0 18px 48px rgba(15, 29, 46, 0.14);

	/* Layout */
	--sp-container: 1280px; /* max-w-7xl */
	--sp-gutter:    1.5rem;

	/* Motion */
	--sp-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* -------------------------------------------------------------------------
   2. Reset / base
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
	font-family: var(--sp-font);
	font-size: 16px;
	line-height: 1.5;
	color: var(--sp-fg);
	background: var(--sp-bg);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
	overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
svg.sp-icon { display: inline-block; vertical-align: middle; flex: none; }

a { color: inherit; text-decoration: none; transition: color 0.15s var(--sp-ease); }
a:hover { color: var(--sp-gold-600); }

h1, h2, h3, h4 { line-height: 1.1; font-weight: 700; letter-spacing: -0.025em; color: var(--sp-navy); }
p { color: var(--sp-body); }

ul { list-style: none; padding: 0; }

button { font-family: inherit; cursor: pointer; }

:focus-visible { outline: 2px solid var(--sp-gold); outline-offset: 2px; border-radius: 3px; }

::selection { background: var(--sp-gold); color: #fff; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: #c7cfd9; border-radius: 6px; }

/* Accessibility helpers */
.screen-reader-text {
	border: 0; clip: rect(1px, 1px, 1px, 1px); clip-path: inset(50%);
	height: 1px; width: 1px; margin: -1px; overflow: hidden; padding: 0;
	position: absolute !important; word-wrap: normal !important;
}
.sp-skip-link {
	position: absolute; left: -9999px; top: 0; z-index: 1000;
	background: var(--sp-navy); color: #fff; padding: 0.75rem 1rem; border-radius: 0 0 var(--sp-radius) 0;
}
.sp-skip-link:focus { left: 0; color: #fff; }

/* -------------------------------------------------------------------------
   3. Layout primitives
   ------------------------------------------------------------------------- */
.sp-container {
	width: 100%;
	max-width: var(--sp-container);
	margin-inline: auto;
	padding-inline: var(--sp-gutter);
}
.sp-main { display: block; }

.sp-section { padding-block: clamp(4rem, 8.75vw, 7rem); } /* desktop 112px = py-28 */
.sp-section--tight { padding-block: clamp(2.5rem, 5vw, 3.5rem); } /* ~56px = py-14 */
.sp-section--muted { background: var(--sp-muted-2); }
.sp-section--navy { background: var(--sp-navy); color: #fff; }
.sp-section--navy h1, .sp-section--navy h2, .sp-section--navy h3 { color: #fff; }
.sp-section--navy p { color: rgba(255, 255, 255, 0.72); }

.sp-section__head { max-width: 720px; margin-bottom: 2.75rem; }
.sp-section__head--center { margin-inline: auto; text-align: center; }

/* Eyebrow / kicker */
.sp-eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 0.6rem;
	font-size: 0.75rem;
	font-weight: 600;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: #ba862d;
	margin-bottom: 0.9rem;
}
.sp-eyebrow::before, .sp-eyebrow::after { content: ""; flex: none; width: 24px; height: 1px; background: currentColor; opacity: 0.55; }
.sp-section--navy .sp-eyebrow { color: var(--sp-gold); }

/* Headings scale (measured: h1 48px, section h2 36px, both weight 700) */
.sp-h1 { font-size: clamp(3rem, 5.2vw, 4.5rem); line-height: 1; letter-spacing: -0.025em; } /* min 48px mobile, lh1.0 like source */
.sp-h2 { font-size: clamp(1.875rem, 2.8vw, 2.25rem); line-height: 1.1; letter-spacing: -0.025em; }
.sp-h2--xl { font-size: 3rem; } /* primary section titles = 48px (calculator, pillars, FAQ) */
.sp-h3 { font-size: 1.25rem; line-height: 1.25; }
.sp-lead { font-size: 1.125rem; line-height: 1.55; color: var(--sp-body); }

/* Numbers render in Inter on the source (no monospace); keep tabular alignment. */
.sp-mono { font-family: var(--sp-font); font-variant-numeric: tabular-nums; letter-spacing: normal; }

/* -------------------------------------------------------------------------
   4. Buttons
   ------------------------------------------------------------------------- */
.sp-btn {
	display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
	font-weight: 600; font-size: 0.875rem; line-height: 1;
	padding: 0.5rem 1rem; border-radius: 8px;
	border: 1px solid transparent; white-space: nowrap;
	transition: transform 0.12s var(--sp-ease), background 0.15s var(--sp-ease), box-shadow 0.15s var(--sp-ease), color 0.15s var(--sp-ease);
}
.sp-btn:active { transform: translateY(1px); }
.sp-btn--accent { background: var(--sp-gold); color: var(--sp-navy); }
.sp-btn--accent:hover { background: #efaf47; color: var(--sp-navy); transform: translateY(-2px); box-shadow: var(--sp-shadow); }
.sp-btn--navy { background: var(--sp-navy); color: #fff; }
.sp-btn--navy:hover { background: var(--sp-navy-600); color: #fff; }
.sp-btn--outline { background: transparent; border-width: 2px; border-color: var(--sp-navy); color: var(--sp-navy); }
.sp-btn--outline:hover { border-color: var(--sp-navy); color: #fff; background: var(--sp-navy); }
.sp-section--navy .sp-btn--outline { border-color: rgba(255,255,255,0.25); color: #fff; }
.sp-section--navy .sp-btn--outline:hover { background: rgba(255,255,255,0.08); color: #fff; }
.sp-btn--ghost { background: transparent; color: var(--sp-navy); padding-inline: 0.5rem; }
.sp-btn--lg { padding: 0.875rem 1.75rem; font-size: 1rem; }
.sp-btn--block { width: 100%; }

.sp-link-quiet { font-weight: 600; font-size: 0.95rem; color: var(--sp-navy); }
.sp-link-quiet:hover { color: var(--sp-gold-600); }
.sp-section--navy .sp-link-quiet { color: #fff; }

.sp-link-arrow { display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 600; color: var(--sp-gold-600); }
.sp-link-arrow:hover { gap: 0.55rem; }

/* -------------------------------------------------------------------------
   5. Header / nav
   ------------------------------------------------------------------------- */
.sp-header {
	position: sticky; top: 0; z-index: 100;
	background: rgba(255, 255, 255, 0.8);
	backdrop-filter: saturate(180%) blur(12px);
	-webkit-backdrop-filter: saturate(180%) blur(12px);
	border-bottom: 1px solid transparent;
	transition: border-color 0.2s var(--sp-ease), box-shadow 0.2s var(--sp-ease);
}
.sp-header.is-stuck { border-bottom-color: var(--sp-border); box-shadow: var(--sp-shadow-sm); }
.sp-header__inner { display: flex; align-items: center; gap: 1.5rem; height: 64px; }

.sp-brand { display: inline-flex; align-items: center; gap: 0.55rem; font-weight: 800; color: var(--sp-navy); letter-spacing: -0.02em; }
.sp-brand:hover { color: var(--sp-navy); }
.sp-brand__mark { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--sp-gold); color: var(--sp-navy); }
.sp-brand__text { font-size: 1.12rem; font-weight: 700; }
.sp-brand__ai { color: var(--sp-gold); }

.sp-nav { margin-inline: auto; }
.sp-nav-menu { display: flex; align-items: center; gap: 2rem; }
.sp-nav-menu a { font-size: 0.875rem; font-weight: 500; color: var(--sp-nav-fg); }
.sp-nav-menu a:hover { color: var(--sp-navy); }

.sp-header__actions { display: flex; align-items: center; gap: 1rem; }

.sp-nav-toggle { display: none; background: transparent; border: 0; color: var(--sp-navy); padding: 0.25rem; }
.sp-nav-toggle__close { display: none; }
.sp-nav-toggle[aria-expanded="true"] .sp-nav-toggle__open { display: none; }
.sp-nav-toggle[aria-expanded="true"] .sp-nav-toggle__close { display: block; }

.sp-mobile-nav { display: none; border-top: 1px solid var(--sp-border); background: #fff; padding: 1rem var(--sp-gutter) 1.5rem; }
.sp-mobile-nav__menu { display: flex; flex-direction: column; gap: 0.25rem; }
.sp-mobile-nav__menu a { display: block; padding: 0.7rem 0; font-weight: 600; border-bottom: 1px solid var(--sp-border-2); }
.sp-mobile-nav__actions { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1.25rem; }

/* -------------------------------------------------------------------------
   6. Cookie banner
   ------------------------------------------------------------------------- */
.sp-cookie {
	position: fixed; inset-inline: 0; bottom: 0; z-index: 50;
	padding: 1rem; pointer-events: none;
}
.sp-cookie__inner {
	display: flex; align-items: center; gap: 1.5rem;
	max-width: 1024px; margin-inline: auto;
	background: var(--sp-navy); color: rgba(255,255,255,0.9);
	border: 1px solid #334f6f; border-radius: var(--sp-radius-lg);
	box-shadow: var(--sp-shadow-lg);
	padding: 1.5rem; pointer-events: auto;
}
.sp-cookie__text { font-size: 0.85rem; color: rgba(255,255,255,0.78); margin: 0; }
.sp-cookie__actions { display: flex; align-items: center; gap: 1rem; flex: none; }
.sp-cookie__actions .sp-link-quiet { color: #fff; white-space: nowrap; }

/* -------------------------------------------------------------------------
   7. Cards, stats, badges, pills — shared
   ------------------------------------------------------------------------- */
.sp-card {
	background: var(--sp-card);
	border: 1px solid var(--sp-border);
	border-radius: 16px;
	box-shadow: none;
}
.sp-card--pad { padding: 2rem; }

.sp-stat { display: flex; flex-direction: column; gap: 0.35rem; }
.sp-stat__label { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; color: var(--sp-muted-fg); }
.sp-stat__value { font-family: var(--sp-font); font-size: clamp(1.5rem, 2.4vw, 1.875rem); font-weight: 700; color: var(--sp-navy); letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.sp-stat__sub { font-size: 0.8rem; color: var(--sp-muted-fg); }
.sp-section--navy .sp-stat__value { color: #fff; }
.sp-section--navy .sp-stat__label, .sp-section--navy .sp-stat__sub { color: rgba(255,255,255,0.6); }

.sp-badge {
	display: inline-flex; align-items: center; gap: 0.35rem;
	font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
	padding: 0.3rem 0.6rem; border-radius: 999px;
}
.sp-badge--gold { background: var(--sp-gold-050); color: var(--sp-gold-600); }
.sp-badge--emerald { background: var(--sp-emerald-050); color: var(--sp-emerald); }

.sp-pill-live { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.72rem; font-weight: 700; color: var(--sp-emerald); text-transform: uppercase; letter-spacing: 0.06em; }
.sp-pill-live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--sp-emerald); box-shadow: 0 0 0 0 rgba(27,172,123,0.5); animation: sp-pulse 2s infinite; }
@keyframes sp-pulse { 0% { box-shadow: 0 0 0 0 rgba(27,172,123,0.5); } 70% { box-shadow: 0 0 0 8px rgba(27,172,123,0); } 100% { box-shadow: 0 0 0 0 rgba(27,172,123,0); } }

/* Checklist */
.sp-check-list { display: flex; flex-direction: column; gap: 0.6rem; }
.sp-check-list li { display: flex; align-items: flex-start; gap: 0.6rem; font-size: 0.92rem; color: var(--sp-fg); }
.sp-check-list li .sp-icon { color: var(--sp-emerald); margin-top: 2px; flex: none; }
.sp-check-list li.is-off { color: var(--sp-muted-fg); }
.sp-check-list li.is-off .sp-icon { color: #c2cad4; }

/* -------------------------------------------------------------------------
   8. Newsletter
   ------------------------------------------------------------------------- */
.sp-newsletter { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; align-items: center; }
.sp-newsletter__input {
	width: 100%; padding: 0.75rem 0.9rem; font: inherit; font-size: 0.95rem;
	color: var(--sp-navy); background: #fff;
	border: 1px solid var(--sp-border); border-radius: var(--sp-radius);
}
.sp-newsletter__input::placeholder { color: #9aa4b0; }
.sp-newsletter__input:focus-visible { border-color: var(--sp-gold); outline: none; box-shadow: 0 0 0 3px rgba(233,167,53,0.25); }
.sp-newsletter__msg { grid-column: 1 / -1; font-size: 0.8rem; margin: 0.15rem 0 0; }
.sp-newsletter__msg.is-ok { color: var(--sp-emerald); }
.sp-newsletter__msg.is-err { color: var(--sp-destructive); }
.sp-footer .sp-newsletter__input { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.16); color: #fff; }
.sp-footer .sp-newsletter__input::placeholder { color: rgba(255,255,255,0.5); }

/* -------------------------------------------------------------------------
   9. Footer
   ------------------------------------------------------------------------- */
.sp-footer { background: var(--sp-navy-footer); color: #9ca3af; padding-block: 4rem 2rem; margin-top: 0; }
.sp-footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.6fr; gap: 2rem; }
.sp-footer .sp-brand, .sp-footer .sp-brand:hover { color: #fff; }
.sp-footer .sp-brand__mark { background: var(--sp-gold); color: var(--sp-navy); }
.sp-footer__tagline { color: rgba(255,255,255,0.6); font-size: 0.875rem; margin-top: 0.9rem; }
.sp-footer__copy { color: rgba(255,255,255,0.4); font-size: 0.8rem; margin-top: 1.25rem; }
.sp-footer__heading { font-size: 0.875rem; font-weight: 600; color: #fff; margin-bottom: 1rem; }
.sp-footer__col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.sp-footer__col a { color: rgba(255,255,255,0.72); font-size: 0.9rem; }
.sp-footer__col a:hover { color: var(--sp-gold); }
.sp-footer__bottom { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,0.1); }
.sp-footer__legal { display: flex; gap: 1.5rem; }
.sp-footer__legal a { color: rgba(255,255,255,0.6); font-size: 0.82rem; }
.sp-footer__legal a:hover { color: #fff; }
.sp-footer__credit { color: rgba(255,255,255,0.4); font-size: 0.8rem; margin: 0; }

/* -------------------------------------------------------------------------
   10. Scroll-reveal (progressive enhancement)
   ------------------------------------------------------------------------- */
.sp-reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.sp-reveal.is-in { opacity: 1; transform: none; }
.js-off .sp-reveal { opacity: 1; transform: none; }

/* -------------------------------------------------------------------------
   11. Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 1023px) {
	.sp-footer__grid { grid-template-columns: 1fr 1fr; }
	.sp-footer__brand { grid-column: 1 / -1; }
	.sp-footer__newsletter { grid-column: 1 / -1; }
	/* Header collapses to the mobile drawer at the lg breakpoint, like the master. */
	.sp-nav, .sp-header__actions { display: none; }
	.sp-nav-toggle { display: inline-flex; margin-left: auto; }
	.sp-mobile-nav:not([hidden]) { display: block; }
}
@media (max-width: 767px) {
	.sp-cookie__inner { flex-direction: column; align-items: flex-start; gap: 0.9rem; }
	.sp-footer__grid { grid-template-columns: 1fr; }
	.sp-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* -------------------------------------------------------------------------
   12. Motion / print preferences
   ------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
	* { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
	.sp-reveal { opacity: 1; transform: none; }
}
@media print {
	.sp-header, .sp-footer, .sp-cookie, .sp-nav-toggle { display: none !important; }
	body { color: #000; }
}

@media (min-width: 1024px) { .sp-container { padding-inline: 2rem; } }