/* =====================================================================
   Dr Health Hub — Shared Theme (light + dark)
   Used by: index.html, product.html
   ===================================================================== */

:root{
  /* Brand */
  --primary:#0e7c86;
  --primary-dark:#0a5c64;
  --on-primary:#ffffff;
  --blue:#1565c0;
  --accent:#dc5a0b;          /* CTA orange — darker than before so white text is readable */
  --accent-dark:#b94406;
  --whatsapp:#25d366;
  --whatsapp-dark:#128c7e;

  /* Surfaces */
  --bg:#f3f8f7;
  --surface:#ffffff;
  --surface-2:#eaf3f2;
  --media-bg:#ffffff;        /* product images always sit on white */
  --text:#13282a;
  --muted:#586e70;
  --border:#d9e6e4;
  --tint:rgba(14,124,134,.08);

  /* Status */
  --success:#168a5b;
  --danger:#d33a3a;
  --warn-bg:#fff4e6;
  --warn-text:#a14500;
  --warn-border:#ffd199;
  --star:#f2a900;

  /* Header / footer */
  --grad:linear-gradient(105deg,#0e7c86 0%,#1565c0 100%);
  --topbar-bg:linear-gradient(90deg,#06201f 0%,#0a5c64 100%);
  --footer-bg:#0a4f56;

  /* Effects */
  --shadow-sm:0 1px 2px rgba(10,60,64,.06),0 2px 8px rgba(10,60,64,.05);
  --shadow-md:0 10px 28px rgba(10,60,64,.12);
  --shadow-lg:0 24px 60px rgba(10,60,64,.22);
  --radius:16px;
  --radius-sm:10px;
  --header-h:72px;
  color-scheme:light;
}

[data-theme="dark"]{
  --primary:#38c1cc;
  --primary-dark:#7fdde4;
  --on-primary:#032427;
  --accent:#ff8a3d;
  --accent-dark:#ff9d5c;

  --bg:#0b1312;
  --surface:#131f1e;
  --surface-2:#1a2b2a;
  --text:#e7f1f0;
  --muted:#93aaa8;
  --border:#243836;
  --tint:rgba(56,193,204,.10);

  --success:#3ccf91;
  --danger:#ff6b6b;
  --warn-bg:#2b2113;
  --warn-text:#ffb066;
  --warn-border:#5a3d17;
  --star:#ffc233;

  --grad:linear-gradient(105deg,#0a4a51 0%,#12408a 100%);
  --topbar-bg:linear-gradient(90deg,#000 0%,#08363b 100%);
  --footer-bg:#071a19;

  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 10px 28px rgba(0,0,0,.45);
  --shadow-lg:0 24px 60px rgba(0,0,0,.6);
  color-scheme:dark;
}
/* dark: orange buttons need dark text for contrast */
[data-theme="dark"] .btn-primary,
[data-theme="dark"] .badge{color:#1b0d00}

/* ===== Base ===== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 64px)}
body{margin:0;font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.55;overflow-x:hidden;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4{font-family:'Poppins',system-ui,sans-serif;margin:0;line-height:1.2;letter-spacing:-.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
button:disabled{opacity:.6;cursor:not-allowed}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:12px;top:-64px;background:var(--accent);color:#fff;padding:10px 16px;border-radius:8px;z-index:300;font-weight:700;transition:top .2s}
.skip-link:focus{top:12px}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ===== Top bar ===== */
.topbar{background:var(--topbar-bg);color:#e6fbf8;font-size:.8rem;display:flex;justify-content:space-between;align-items:center;gap:6px 16px;flex-wrap:wrap;padding:8px 24px}
.topbar a{text-decoration:underline;text-underline-offset:2px}

/* ===== Header ===== */
header.main{position:sticky;top:0;z-index:40;background:var(--grad);color:#fff;padding:12px 24px;display:flex;align-items:center;gap:16px;box-shadow:0 4px 18px rgba(0,0,0,.14)}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;min-width:0}
.brand img{width:46px;height:46px;object-fit:contain;border-radius:12px;background:#fff;padding:2px;box-shadow:0 4px 12px rgba(0,0,0,.25)}
.brand h1{font-size:1.25rem;color:#fff}
.brand p{font-size:.74rem;opacity:.9}
.search-wrap{flex:1;min-width:0;position:relative;max-width:620px}
.search-wrap input{width:100%;padding:12px 16px 12px 44px;border-radius:999px;border:2px solid transparent;font-size:.95rem;background:#fff;color:#13282a;font-weight:500;font-family:inherit;transition:box-shadow .2s,border-color .2s}
[data-theme="dark"] .search-wrap input{background:var(--surface);color:var(--text)}
.search-wrap input::placeholder{color:#7a8f8d;opacity:1}
.search-wrap input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,138,61,.28)}
.search-wrap .s-ico{position:absolute;left:16px;top:50%;transform:translateY(-50%);pointer-events:none}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}
.icon-btn{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);color:#fff;width:42px;height:42px;border-radius:12px;font-size:1.1rem;display:inline-flex;align-items:center;justify-content:center;transition:background .2s;flex-shrink:0}
.icon-btn:hover{background:rgba(255,255,255,.26)}
.cart-btn{position:relative;background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:10px 18px;font-weight:600;font-size:.9rem;display:inline-flex;gap:8px;align-items:center;transition:background .2s}
.cart-btn:hover{background:rgba(255,255,255,.26)}
.badge{position:absolute;top:-8px;right:-6px;background:var(--accent);color:#fff;font-size:.7rem;min-width:20px;height:20px;padding:0 5px;border-radius:999px;display:flex;align-items:center;justify-content:center;font-weight:700;border:2px solid #0e5c8a}
.badge.bounce{animation:badgeBounce .4s}
@keyframes badgeBounce{0%,100%{transform:scale(1)}50%{transform:scale(1.4)}}
.auth-btn{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:9px 15px;font-weight:600;font-size:.84rem;white-space:nowrap;transition:background .2s}
.auth-btn:hover{background:rgba(255,255,255,.26)}
#authArea{display:flex;align-items:center;gap:8px}
.hello{font-size:.84rem;max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:900px){.hello{display:none}.cart-label{display:none}.cart-btn{padding:10px 14px}}
@media(max-width:700px){
  header.main{flex-wrap:wrap;padding:10px 14px;gap:10px}
  .brand p{display:none}
  .brand h1{font-size:1.05rem}
  .brand img{width:38px;height:38px}
  .header-actions{order:2}
  .search-wrap{order:3;flex-basis:100%;max-width:none}
  .topbar{padding:7px 14px;font-size:.74rem;justify-content:center}
}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border-radius:12px;border:1.5px solid transparent;font-weight:600;font-size:.88rem;line-height:1.2;transition:transform .15s,background .2s,box-shadow .2s,color .2s,border-color .2s}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(220,90,11,.25)}
.btn-primary:hover{background:var(--accent-dark);box-shadow:0 8px 20px rgba(220,90,11,.35)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:var(--on-primary)}
.btn-wa{background:var(--whatsapp);color:#05301a}
.btn-wa:hover{background:#3ee67f}
.btn-ghost{background:var(--surface-2);color:var(--text)}
.btn-ghost:hover{background:var(--border)}
.btn-lg{padding:14px 26px;font-size:1rem;border-radius:999px}
.btn-block{width:100%}
.btn svg{width:20px;height:20px;flex-shrink:0}

/* ===== Overlay / modal / drawer ===== */
.overlay{position:fixed;inset:0;background:rgba(5,20,20,.55);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);opacity:0;pointer-events:none;transition:opacity .25s;z-index:50}
.overlay.show{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(420px,94vw);background:var(--surface);color:var(--text);z-index:60;transform:translateX(100%);visibility:hidden;transition:transform .3s,visibility 0s .3s;display:flex;flex-direction:column;box-shadow:var(--shadow-lg)}
.drawer.left{left:0;right:auto;transform:translateX(-100%)}
.drawer.show{transform:translateX(0);visibility:visible;transition:transform .3s,visibility 0s}
.drawer-head{padding:18px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.drawer-head h3{font-size:1.1rem}
.drawer-body{flex:1;overflow-y:auto;padding:6px 20px 14px}
.drawer-foot{padding:16px 20px calc(16px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--border);background:var(--surface)}
.close-btn{background:var(--surface-2);border:none;color:var(--muted);width:36px;height:36px;border-radius:10px;font-size:1rem;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.close-btn:hover{background:var(--border);color:var(--text)}
.modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-48%) scale(.96);background:var(--surface);color:var(--text);z-index:70;border-radius:20px;padding:26px;width:min(440px,94vw);opacity:0;pointer-events:none;visibility:hidden;transition:opacity .22s,transform .22s,visibility 0s .22s;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}
.modal.show{opacity:1;pointer-events:auto;visibility:visible;transform:translate(-50%,-50%) scale(1);transition:opacity .22s,transform .22s,visibility 0s}
.modal h3{font-size:1.25rem;margin-bottom:4px}
.modal-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}

/* ===== Forms ===== */
.field{margin:14px 0}
.field label{display:block;font-size:.82rem;font-weight:600;margin-bottom:6px;color:var(--muted)}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border-radius:12px;border:1.5px solid var(--border);background:var(--surface-2);color:var(--text);font-family:inherit;font-size:.95rem;transition:border-color .2s,box-shadow .2s,background .2s}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--tint);background:var(--surface)}
.field-error{color:var(--danger);font-size:.84rem;text-align:center;margin-top:8px}

/* ===== Toast ===== */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:#0a3f45;color:#fff;padding:12px 22px;border-radius:999px;font-size:.9rem;font-weight:500;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:90;max-width:92vw;text-align:center;box-shadow:var(--shadow-md)}
[data-theme="dark"] .toast{background:#e7f1f0;color:#0b1312}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== Skeleton ===== */
.skeleton{background:linear-gradient(90deg,var(--surface-2) 25%,var(--border) 37%,var(--surface-2) 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite;border-radius:8px}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ===== Footer ===== */
footer.site{background:var(--footer-bg);color:#d7efec;padding:48px 24px 22px;font-size:.88rem}
.footer-content{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px;max-width:1200px;margin:0 auto;padding-bottom:24px}
.footer-brand h3{font-size:1.3rem;margin-bottom:8px;color:#fff}
.footer-brand p{margin:4px 0;color:#b4d3d0}
.footer-links h4{font-size:.82rem;margin-bottom:12px;color:#fff;text-transform:uppercase;letter-spacing:.8px}
.footer-links a,.footer-links button{display:block;background:none;border:none;color:#b4d3d0;font-size:.88rem;padding:5px 0;text-align:left;transition:color .2s}
.footer-links a:hover,.footer-links button:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding-top:20px;text-align:center;max-width:1200px;margin:0 auto}
.footer-bottom .disclaimer{font-size:.78rem;color:#a9c9c6;max-width:900px;margin:0 auto 14px;line-height:1.65}
@media(max-width:768px){.footer-content{grid-template-columns:1fr;gap:22px}}