/* =============================================================
   StudyPlus — Retro-Metro Design System
   Color & Typography Tokens
   ============================================================= */

:root {
  /* ---------- Surfaces ---------- */
  --bg:            #F5F0E8;
  --bg-alt:        #EDE8DD;
  --white:         #FFFFFF;

  /* ---------- Brand ---------- */
  --primary:       #3D6B35;
  --primary-hover: #4F772D;
  --primary-dark:  #2A4D24;

  /* ---------- Text ---------- */
  --text:          #2A2A2A;
  --text-muted:    #5A5A5A;
  --text-on-dark:  rgba(255, 255, 255, 0.7);
  --text-on-footer: rgba(245, 240, 232, 0.5);
  --text-legal:    rgba(245, 240, 232, 0.3);

  /* ---------- Borders ---------- */
  --border:        #2A2A2A;
  --border-light:  #4A4A4A;

  /* ---------- Pastel Accents ---------- */
  --accent-green:  #E8F0D8;
  --accent-yellow: #FFF3D0;
  --accent-peach:  #F0E4D7;
  --accent-mint:   #D8E8E0;

  /* ---------- Typography ---------- */
  --font-sans: "Heebo", -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --fw-regular: 400;
  --fw-bold:    700;
  --fw-extrabold: 800;
  --fw-black:   900;

  --fs-xs:    0.75rem;
  --fs-sm:    0.875rem;
  --fs-base:  1rem;
  --fs-lg:    1.125rem;
  --fs-xl:    1.25rem;
  --fs-2xl:   1.5rem;
  --fs-3xl:   1.875rem;
  --fs-4xl:   2.25rem;
  --fs-5xl:   3rem;
  --fs-6xl:   3.75rem;
  --fs-7xl:   4.5rem;

  --lh-tight:    1.2;
  --lh-snug:     1.35;
  --lh-normal:   1.5;
  --lh-relaxed:  1.625;

  --bw-hairline: 1.5px;
  --bw-thin:     2px;
  --bw-default:  3px;
  --bw-thick:    4px;

  --r-none:    0;
  --r-md:      6px;
  --r-lg:      8px;
  --r-xl:      12px;
  --r-app:     28px;

  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;

  --container-narrow: 48rem;
  --container:        72rem;
}

html {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  background: var(--bg);
  color: var(--text);
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  color: var(--text);
  margin: 0;
  line-height: var(--lh-tight);
}

h1, .h1 {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-black);
  letter-spacing: -0.02em;
}
@media (min-width: 640px) {
  h1, .h1 { font-size: var(--fs-7xl); }
}

h2, .h2 {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-black);
  letter-spacing: -0.015em;
}
@media (min-width: 640px) {
  h2, .h2 { font-size: var(--fs-4xl); }
}

h3, .h3 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
}
@media (min-width: 640px) {
  h3, .h3 { font-size: var(--fs-xl); }
}

p, .body {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--text-muted);
  margin: 0;
}
@media (min-width: 640px) {
  p, .body { font-size: var(--fs-lg); }
}

.lead {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--text-muted);
}
@media (min-width: 640px) {
  .lead { font-size: var(--fs-xl); }
}

.price {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-black);
  color: var(--primary);
  letter-spacing: -0.02em;
}

.caption {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.legal {
  font-size: var(--fs-xs);
  color: var(--text-legal);
}

[dir="rtl"] {
  text-align: right;
}

.container       { max-width: var(--container); margin: 0 auto; padding: 0 var(--sp-4); }
.container-narrow{ max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--sp-4); }
@media (min-width: 640px) {
  .container, .container-narrow { padding: 0 var(--sp-6); }
}

/* =============================================================
   MOBILE OVERRIDES (≤640px) — beat inline JSX styles via !important
   ============================================================= */
@media (max-width: 640px) {
  .ss-nav         { padding: 10px 16px !important; }
  .ss-nav-logo    { width: 36px !important; height: 36px !important; border-radius: 8px !important; }
  .ss-nav-brand   { font-size: 15px !important; }
  .ss-nav-link    { font-size: 12px !important; padding: 6px 8px !important; }

  .ss-hero-h1     { font-size: 34px !important; line-height: 1.1 !important; }
  .ss-hero-sub    { font-size: 15px !important; line-height: 1.55 !important; }
  .ss-hero-icon   { width: 84px !important; height: 84px !important; border-radius: 22px !important; }

  .ss-apps-h2     { font-size: 28px !important; }
  .ss-apps-sub    { font-size: 15px !important; }

  .ss-card-title  { font-size: 20px !important; }

  .ss-soon-block  { padding: 24px 16px !important; }
  .ss-soon-title  { font-size: 22px !important; }

  .ss-about-grid  { grid-template-columns: 1fr !important; gap: 32px !important; }
  .ss-about-h2    { font-size: 26px !important; }
  .ss-about-p     { font-size: 15px !important; }
  .ss-stats       { grid-template-columns: 1fr 1fr !important; gap: 12px !important; }

  .ss-contact-h2  { font-size: 30px !important; }
  .ss-contact-sub { font-size: 15px !important; }
}

@media (max-width: 420px) {
  .ss-nav-brand   { font-size: 14px !important; }
  .ss-nav-link    { font-size: 11px !important; padding: 6px 6px !important; }

  .ss-hero-h1     { font-size: 28px !important; }
  .ss-apps-h2     { font-size: 24px !important; }
  .ss-about-h2    { font-size: 22px !important; }
  .ss-contact-h2  { font-size: 26px !important; }
}

@media (max-width: 360px) {
  .ss-nav-brand   { display: none !important; }
}