/* KaiDee.live — Main Stylesheet */
/* Tropical theme, no CDN, CSS variables */

/* ===== Variables ===== */
:root {
  --c-primary:    #2b8a3e;
  --c-primary-h:  #237032;
  --c-accent:     #f59f00;
  --c-accent-h:   #e08e00;
  --c-sea:        #1c7ed6;
  --c-sea-light:  #74c0fc;
  --c-sand:       #fff3bf;
  --c-sand-d:     #ffe066;
  --c-bg:         #f0f9ff;
  --c-surface:    #ffffff;
  --c-border:     #dee2e6;
  --c-text:       #212529;
  --c-text-m:     #495057;
  --c-text-l:     #868e96;
  --c-error:      #e03131;
  --c-success:    #2f9e44;
  --radius:       12px;
  --radius-sm:    8px;
  --shadow:       0 4px 20px rgba(0,0,0,.08);
  --shadow-md:    0 8px 32px rgba(0,0,0,.12);
  --font:         'Sarabun', system-ui, -apple-system, sans-serif;
  --transition:   .18s ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--c-sea); text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; }
button { cursor: pointer; font-family: inherit; }
input, button { font-size: 1rem; }

/* ===== Typography ===== */
h1 { font-size: 2rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.125rem; font-weight: 600; }

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .65rem 1.5rem;
  background: var(--c-primary); color: #fff;
  border: 2px solid var(--c-primary);
  border-radius: var(--radius-sm);
  font-weight: 600; transition: background var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn-primary:hover { background: var(--c-primary-h); border-color: var(--c-primary-h); text-decoration: none; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .65rem 1.5rem;
  background: transparent; color: var(--c-primary);
  border: 2px solid var(--c-primary);
  border-radius: var(--radius-sm);
  font-weight: 600; transition: all var(--transition);
  text-decoration: none;
}
.btn-outline:hover { background: var(--c-primary); color: #fff; text-decoration: none; transform: translateY(-1px); }

.btn-full { width: 100%; }
.btn-lg { padding: .85rem 2rem; font-size: 1.05rem; }

/* ===== Alerts ===== */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .9rem; font-weight: 500;
  margin-bottom: 1rem;
}
.alert-error   { background: #fff5f5; color: var(--c-error);   border: 1px solid #ffc9c9; }
.alert-success { background: #ebfbee; color: var(--c-success);  border: 1px solid #b2f2bb; }

/* ===== Site Header ===== */
.site-header {
  display: flex; align-items: center; gap: 1rem;
  padding: .75rem 2rem;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.logo {
  display: flex; align-items: center; gap: .5rem;
  font-size: 1.4rem; font-weight: 800;
  color: var(--c-primary); text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo-icon { font-size: 1.6rem; }
.logo-text  { letter-spacing: -.5px; }

.site-nav {
  display: flex; align-items: center; gap: .75rem;
  margin-left: auto;
}
.site-nav a { font-weight: 500; color: var(--c-text-m); font-size: .95rem; }
.site-nav a:hover { color: var(--c-primary); text-decoration: none; }

.lang-switcher { margin-left: .75rem; }
.lang-btn {
  padding: .3rem .75rem;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-size: .8rem; font-weight: 600;
  color: var(--c-text-m); background: var(--c-surface);
  transition: all var(--transition);
}
.lang-btn:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }

/* ===== Site Footer ===== */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--c-text-l);
  font-size: .85rem;
  border-top: 1px solid var(--c-border);
  margin-top: auto;
}

/* ===== AUTH PAGES ===== */
body.page-auth { background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 50%, #e8f5e9 100%); }
body.page-auth .site-main { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 130px); padding: 2rem 1rem; }

.auth-wrap {
  position: relative;
  width: 100%;
  max-width: 420px;
}

.auth-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-md);
  position: relative; z-index: 1;
}

.auth-brand {
  text-align: center;
  margin-bottom: 2rem;
}
.brand-icon { font-size: 3rem; display: block; margin-bottom: .5rem; }
.auth-brand h1 { font-size: 2rem; color: var(--c-primary); letter-spacing: -1px; }
.brand-sub { color: var(--c-text-l); font-size: .9rem; margin-top: .25rem; }

/* Auth Form */
.auth-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: .4rem; }
.form-group label { font-weight: 600; font-size: .9rem; color: var(--c-text-m); }
.form-hint { font-size: .78rem; color: var(--c-text-l); }

.form-group input {
  padding: .7rem 1rem;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
  background: var(--c-surface);
  color: var(--c-text);
}
.form-group input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(43,138,62,.15);
}
.form-group input.error { border-color: var(--c-error); }

.input-wrap { position: relative; }
.input-wrap input { padding-right: 3rem; }
.toggle-pw {
  position: absolute; right: .75rem; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--c-text-l);
  padding: .25rem; display: flex;
}
.toggle-pw:hover { color: var(--c-primary); }

/* Submit button loading state */
.btn-primary:disabled { opacity: .7; cursor: not-allowed; transform: none; }
.spin { animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.auth-switch {
  text-align: center;
  margin-top: 1.5rem;
  font-size: .9rem;
  color: var(--c-text-m);
}
.auth-switch a { font-weight: 600; color: var(--c-primary); }

/* Decorative waves */
.auth-deco { position: absolute; bottom: -30px; left: 0; right: 0; height: 80px; overflow: hidden; z-index: 0; pointer-events: none; }
.wave {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 60px; border-radius: 50%;
  opacity: .4;
}
.wave1 { background: var(--c-sea-light); animation: wave 6s linear infinite; }
.wave2 { background: var(--c-sand-d); animation: wave 8s linear infinite reverse; height: 50px; }
@keyframes wave {
  0%   { transform: translateX(-20px) scaleY(1); }
  50%  { transform: translateX(20px) scaleY(.9); }
  100% { transform: translateX(-20px) scaleY(1); }
}
.deco-island { display: none; }

/* ===== HOME PAGE ===== */
body.page-home .site-main { padding: 0; }

.hero {
  position: relative;
  min-height: 80vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, #0077b6 0%, #00b4d8 40%, #90e0ef 100%);
  color: #fff;
  padding: 4rem 2rem;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg .wave { opacity: .2; }
.hero-bg .wave3 { background: #fff; height: 70px; animation: wave 10s linear infinite; }

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 640px; }
.hero-title { font-size: clamp(2rem, 5vw, 3.5rem); text-shadow: 0 2px 12px rgba(0,0,0,.2); }
.hero-sub { font-size: 1.15rem; opacity: .9; margin: 1rem 0 2rem; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-cta .btn-primary { background: var(--c-accent); border-color: var(--c-accent); color: #212529; font-weight: 700; }
.hero-cta .btn-primary:hover { background: var(--c-accent-h); border-color: var(--c-accent-h); }
.hero-cta .btn-outline { border-color: rgba(255,255,255,.7); color: #fff; }
.hero-cta .btn-outline:hover { background: rgba(255,255,255,.15); color: #fff; }

.hero-art { position: absolute; z-index: 0; font-size: 5rem; opacity: .15; }
.art-island { bottom: 10%; right: 5%; position: absolute; font-size: 8rem; }
.art-shop   { top: 15%; left: 5%;  position: absolute; font-size: 5rem; }
.art-fish   { top: 30%; right: 15%; position: absolute; font-size: 3rem; }

.features { padding: 4rem 2rem; max-width: 1100px; margin: 0 auto; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.feature-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon { font-size: 2.5rem; display: block; margin-bottom: 1rem; }
.feature-card h3 { margin-bottom: .5rem; color: var(--c-primary); }
.feature-card p { color: var(--c-text-m); font-size: .95rem; }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .site-header { padding: .75rem 1rem; }
  .site-nav .btn-outline { display: none; }
  .auth-card { padding: 2rem 1.25rem; }
}