/* ============================================================
   RedditoAuto — Design System + Styles
   ============================================================ */

:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  --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;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-wide: 1200px;
}

:root, [data-theme="light"] {
  --color-bg:              #f0f4ff;
  --color-surface:         #ffffff;
  --color-surface-2:       #f8f9ff;
  --color-surface-offset:  #eef1fb;
  --color-border:          rgba(15,23,42,0.10);
  --color-divider:         rgba(15,23,42,0.07);
  --color-text:            #0f172a;
  --color-text-muted:      #475569;
  --color-text-faint:      #94a3b8;
  --color-text-inverse:    #f8fafc;
  --color-primary:         #2563eb;
  --color-primary-hover:   #1d4ed8;
  --color-primary-highlight: #dbeafe;
  --color-success:         #16a34a;
  --color-success-bg:      #f0fdf4;
  --color-warning:         #d97706;
  --color-warning-bg:      #fffbeb;
  --color-error:           #dc2626;
  --color-error-bg:        #fef2f2;
  --color-blue-soft:       #eff6ff;
  --shadow-sm: 0 1px 3px rgba(30,58,138,0.08);
  --shadow-md: 0 4px 16px rgba(30,58,138,0.10);
  --shadow-lg: 0 12px 40px rgba(30,58,138,0.14);
}

[data-theme="dark"] {
  --color-bg:              #0d1117;
  --color-surface:         #161b22;
  --color-surface-2:       #1c2330;
  --color-surface-offset:  #1a2030;
  --color-border:          rgba(248,250,252,0.09);
  --color-divider:         rgba(248,250,252,0.06);
  --color-text:            #e2e8f0;
  --color-text-muted:      #94a3b8;
  --color-text-faint:      #475569;
  --color-text-inverse:    #0f172a;
  --color-primary:         #60a5fa;
  --color-primary-hover:   #93c5fd;
  --color-primary-highlight: #1e3a5f;
  --color-success:         #4ade80;
  --color-success-bg:      #052e16;
  --color-warning:         #fbbf24;
  --color-warning-bg:      #1c1008;
  --color-error:           #f87171;
  --color-error-bg:        #1c0a0a;
  --color-blue-soft:       #1e3a5f;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.30);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.40);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.50);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:#0d1117;--color-surface:#161b22;--color-surface-2:#1c2330;
    --color-surface-offset:#1a2030;--color-border:rgba(248,250,252,0.09);
    --color-divider:rgba(248,250,252,0.06);--color-text:#e2e8f0;
    --color-text-muted:#94a3b8;--color-text-faint:#475569;
    --color-text-inverse:#0f172a;--color-primary:#60a5fa;
    --color-primary-hover:#93c5fd;--color-primary-highlight:#1e3a5f;
    --color-success:#4ade80;--color-success-bg:#052e16;
    --color-warning:#fbbf24;--color-warning-bg:#1c1008;
    --color-error:#f87171;--color-error-bg:#1c0a0a;
    --color-blue-soft:#1e3a5f;
    --shadow-sm:0 1px 3px rgba(0,0,0,0.30);
    --shadow-md:0 4px 16px rgba(0,0,0,0.40);
    --shadow-lg:0 12px 40px rgba(0,0,0,0.50);
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: none; text-size-adjust: none; -webkit-font-smoothing: antialiased; scroll-padding-top: var(--space-16); }
body { min-height: 100dvh; font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); background: var(--color-bg); line-height: 1.6; transition: background var(--transition), color var(--transition); }
img, picture, svg { display: block; max-width: 100%; }
input, button, select, textarea { font: inherit; color: inherit; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.2; }
p, li { text-wrap: pretty; }
button { cursor: pointer; background: none; border: none; }
::selection { background: rgba(37,99,235,0.15); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }
.hidden { display: none !important; }

.skip-link { position:absolute; top:-100%; left:var(--space-4); background:var(--color-primary); color:#fff; padding:var(--space-2) var(--space-4); border-radius:var(--radius-md); font-size:var(--text-sm); z-index:999; text-decoration:none; }
.skip-link:focus { top:var(--space-4); }

.container { max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-5); }

/* Header */
.header { position:sticky; top:0; z-index:100; background:rgba(255,255,255,0.88); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px); border-bottom:1px solid var(--color-border); }
[data-theme="dark"] .header { background:rgba(22,27,34,0.88); }
.header__inner { display:flex; align-items:center; justify-content:space-between; height:60px; gap:var(--space-4); }
.logo { display:flex; align-items:center; gap:var(--space-3); font-size:var(--text-lg); font-weight:700; color:var(--color-text); text-decoration:none; flex-shrink:0; }
.header-nav { display:flex; gap:var(--space-2); }
.nav-link { font-size:var(--text-sm); font-weight:500; color:var(--color-text-muted); text-decoration:none; padding:var(--space-2) var(--space-3); border-radius:var(--radius-md); transition:background var(--transition), color var(--transition); }
.nav-link:hover { background:var(--color-surface-offset); color:var(--color-text); }
.theme-toggle { width:40px; height:40px; border-radius:var(--radius-lg); display:flex; align-items:center; justify-content:center; color:var(--color-text-muted); transition:background var(--transition), color var(--transition); flex-shrink:0; }
.theme-toggle:hover { background:var(--color-surface-offset); color:var(--color-text); }

/* Hero */
.hero { padding:clamp(var(--space-12),6vw,var(--space-20)) 0 clamp(var(--space-8),4vw,var(--space-12)); background:linear-gradient(135deg,rgba(37,99,235,0.08) 0%,transparent 60%); }
.hero__title { font-size:var(--text-2xl); font-weight:800; color:var(--color-text); margin-bottom:var(--space-4); }
.accent { color:var(--color-primary); }
.hero__sub { font-size:var(--text-lg); color:var(--color-text-muted); max-width:52ch; }

/* Section */
.section-title { font-size:var(--text-xl); font-weight:800; color:var(--color-text); margin-bottom:var(--space-2); }
.section-sub { font-size:var(--text-base); color:var(--color-text-muted); margin-bottom:var(--space-8); max-width:60ch; }

/* Calc section */
.calc-section { padding-block:clamp(var(--space-8),5vw,var(--space-16)); }
.calc-section__grid { display:grid; grid-template-columns:1fr 1fr; gap:var(--space-8); align-items:start; }
@media (max-width:900px) { .calc-section__grid { grid-template-columns:1fr; } }

/* Cards */
.card { background:var(--color-surface); border-radius:var(--radius-2xl); border:1px solid var(--color-border); padding:var(--space-8); box-shadow:var(--shadow-sm); }
.card__title { font-size:var(--text-lg); font-weight:700; color:var(--color-text); margin-bottom:var(--space-6); }

/* Forms */
.form-group { display:flex; flex-direction:column; gap:var(--space-2); margin-bottom:var(--space-5); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:var(--space-4); }
@media (max-width:480px) { .form-row { grid-template-columns:1fr; } }
label { font-size:var(--text-sm); font-weight:600; color:var(--color-text-muted); }
input[type="number"], input[type="text"], select { width:100%; padding:var(--space-3) var(--space-4); background:var(--color-surface-2); border:1px solid var(--color-border); border-radius:var(--radius-lg); font-size:var(--text-base); color:var(--color-text); transition:border-color var(--transition),box-shadow var(--transition); appearance:none; -webkit-appearance:none; }
input[type="number"]:focus, select:focus { border-color:var(--color-primary); box-shadow:0 0 0 3px rgba(37,99,235,0.12); outline:none; }
input::placeholder { color:var(--color-text-faint); }
.form-hint { font-size:var(--text-xs); color:var(--color-text-faint); }

/* Checkbox group */
.durate-check-group { display:flex; flex-wrap:wrap; gap:var(--space-3); }
.checkbox-label { display:flex; align-items:center; gap:var(--space-2); font-size:var(--text-sm); font-weight:500; color:var(--color-text-muted); cursor:pointer; padding:var(--space-2) var(--space-3); border:1px solid var(--color-border); border-radius:var(--radius-lg); transition:background var(--transition),border-color var(--transition); }
.checkbox-label:hover { background:var(--color-surface-offset); }
.checkbox-label input[type="checkbox"] { width:16px; height:16px; accent-color:var(--color-primary); cursor:pointer; }

/* Range */
.range-wrapper { display:flex; align-items:center; gap:var(--space-4); }
input[type="range"] { flex:1; height:4px; border-radius:9999px; accent-color:var(--color-primary); cursor:pointer; border:none; background:var(--color-surface-offset); padding:0; }
.range-value { font-size:var(--text-sm); font-weight:700; color:var(--color-primary); min-width:3rem; text-align:right; }

/* Buttons */
.btn { display:inline-flex; align-items:center; justify-content:center; padding:var(--space-3) var(--space-6); border-radius:var(--radius-lg); font-size:var(--text-sm); font-weight:600; text-decoration:none; transition:background var(--transition),color var(--transition),box-shadow var(--transition),transform var(--transition); min-height:44px; }
.btn:active { transform:scale(0.98); }
.btn-primary { background:var(--color-primary); color:#fff; width:100%; margin-top:var(--space-4); box-shadow:0 2px 8px rgba(37,99,235,0.25); }
.btn-primary:hover { background:var(--color-primary-hover); }
.btn-ghost { background:transparent; color:var(--color-text-muted); width:100%; margin-top:var(--space-2); border:1px solid var(--color-border); }
.btn-ghost:hover { background:var(--color-surface-offset); color:var(--color-text); }

/* Results */
.results-panel { display:flex; flex-direction:column; gap:var(--space-5); }
.result-main { background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-hover) 100%); border:none; text-align:center; padding:var(--space-10) var(--space-8); }
.result-label { font-size:var(--text-sm); font-weight:600; color:rgba(255,255,255,0.75); text-transform:uppercase; letter-spacing:0.08em; margin-bottom:var(--space-3); }
.result-value { font-size:var(--text-2xl); font-weight:800; color:#fff; line-height:1; transition:all 0.4s cubic-bezier(0.16,1,0.3,1); }
.result-sub { font-size:var(--text-sm); color:rgba(255,255,255,0.65); margin-top:var(--space-3); }
.breakdown-list { list-style:none; display:flex; flex-direction:column; gap:var(--space-3); }
.breakdown-item { display:flex; justify-content:space-between; align-items:center; font-size:var(--text-sm); padding:var(--space-2) 0; border-bottom:1px solid var(--color-divider); color:var(--color-text-muted); }
.breakdown-item:last-child { border-bottom:none; }
.breakdown-item .label { font-weight:500; }
.breakdown-item .value { font-weight:700; color:var(--color-text); font-variant-numeric:tabular-nums; }
.breakdown-placeholder { color:var(--color-text-faint); font-style:italic; justify-content:center; }
.breakdown-total { display:flex; justify-content:space-between; align-items:center; padding-top:var(--space-4); margin-top:var(--space-3); border-top:2px solid var(--color-border); font-weight:700; font-size:var(--text-base); color:var(--color-text); }
.verdict-text { font-size:var(--text-base); font-weight:500; color:var(--color-text-muted); line-height:1.7; }
.verdict-card.verdict-ok  { color:var(--color-success); background:var(--color-success-bg); border:none; padding:var(--space-6); }
.verdict-card.verdict-warn { color:var(--color-warning); background:var(--color-warning-bg); border:none; padding:var(--space-6); }
.verdict-card.verdict-ko  { color:var(--color-error);   background:var(--color-error-bg);   border:none; padding:var(--space-6); }

/* ======================== SIMULATORE ======================== */
.sim-section { padding-block:clamp(var(--space-8),5vw,var(--space-16)); background:var(--color-surface-2); border-top:1px solid var(--color-border); margin-top:clamp(var(--space-8),5vw,var(--space-16)); }

.sim-grid { display:grid; grid-template-columns:340px 1fr; gap:var(--space-8); align-items:start; margin-bottom:var(--space-8); }
@media (max-width:900px) { .sim-grid { grid-template-columns:1fr; } }

.sim-form-card { } /* inherits .card */

/* KPI panel */
.sim-kpi-panel { display:flex; flex-wrap:wrap; gap:var(--space-5); align-content:start; }
.sim-empty { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:var(--space-4); color:var(--color-text-faint); text-align:center; padding:var(--space-12) var(--space-8); flex:1; }
.sim-empty svg { opacity:0.4; }
.sim-empty p { font-size:var(--text-sm); max-width:24ch; }

#simKpiContent { display:flex; flex-wrap:wrap; gap:var(--space-5); width:100%; }

.kpi-card { background:var(--color-surface); border:1px solid var(--color-border); border-radius:var(--radius-xl); padding:var(--space-6); flex:1; min-width:200px; box-shadow:var(--shadow-sm); }
.kpi-header { display:flex; align-items:center; gap:var(--space-2); margin-bottom:var(--space-5); flex-wrap:wrap; }
.kpi-badge { font-size:var(--text-sm); font-weight:700; color:var(--color-primary); background:var(--color-primary-highlight); padding:var(--space-1) var(--space-3); border-radius:9999px; }
.kpi-tag { font-size:var(--text-xs); font-weight:600; padding:var(--space-1) var(--space-2); border-radius:var(--radius-sm); }
.tag-green { background:var(--color-success-bg); color:var(--color-success); }
.tag-blue  { background:var(--color-blue-soft);  color:var(--color-primary); }
.kpi-row { display:flex; justify-content:space-between; align-items:center; padding:var(--space-2) 0; border-bottom:1px solid var(--color-divider); font-size:var(--text-sm); }
.kpi-row:last-of-type { border-bottom:none; }
.kpi-label { color:var(--color-text-muted); font-weight:500; }
.kpi-value { font-weight:700; color:var(--color-text); font-variant-numeric:tabular-nums; }
.kpi-warn { color:var(--color-warning) !important; }
.kpi-btn { margin-top:var(--space-4); }

/* Table */
.sim-table-card { margin-top:0; }
.sim-table-header { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:var(--space-4); margin-bottom:var(--space-6); }
.sim-table-header .card__title { margin-bottom:0; }
.sim-tab-group { display:flex; gap:var(--space-2); flex-wrap:wrap; }
.sim-tab { font-size:var(--text-xs); font-weight:600; padding:var(--space-1) var(--space-3); border-radius:9999px; border:1px solid var(--color-border); color:var(--color-text-muted); background:transparent; transition:background var(--transition),color var(--transition),border-color var(--transition); min-height:32px; }
.sim-tab:hover { background:var(--color-surface-offset); color:var(--color-text); }
.sim-tab--active { background:var(--color-primary); color:#fff; border-color:var(--color-primary); }

.table-scroll { overflow-x:auto; -webkit-overflow-scrolling:touch; }
.amort-table { width:100%; border-collapse:collapse; font-size:var(--text-sm); font-variant-numeric:tabular-nums; }
.amort-table th { text-align:left; padding:var(--space-3) var(--space-4); font-size:var(--text-xs); font-weight:600; color:var(--color-text-faint); text-transform:uppercase; letter-spacing:0.06em; border-bottom:2px solid var(--color-border); white-space:nowrap; }
.amort-table td { padding:var(--space-3) var(--space-4); border-bottom:1px solid var(--color-divider); color:var(--color-text-muted); white-space:nowrap; }
.amort-table tr:last-child td { border-bottom:none; }
.amort-table tr:hover td { background:var(--color-surface-offset); }
.col-mese { color:var(--color-text-faint); font-weight:600; }
.col-cap  { color:var(--color-success); }
.col-int  { color:var(--color-warning); }
.col-res  { color:var(--color-text); font-weight:600; }
.table-placeholder { text-align:center; color:var(--color-text-faint); font-style:italic; padding:var(--space-10) !important; }

/* Footer */
.footer { margin-top:clamp(var(--space-12),6vw,var(--space-20)); padding-block:var(--space-8); border-top:1px solid var(--color-border); text-align:center; font-size:var(--text-xs); color:var(--color-text-faint); }

/* Animations */
@keyframes fadeUp { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:translateY(0); } }
.animate-in { animation:fadeUp 0.35s cubic-bezier(0.16,1,0.3,1) forwards; }