/* ==========================================================================
   Original Music Live — Unified Visual System
   Step F: LOCKED STYLE FOUNDATION (RESPONSIVE REFINED)
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  --bg: #0f1218;
  --surface: #151a22;
  --surface-2: #1d2533;

  --text: #e9edf5;
  --muted: #b7c0d1;

  --brand: #00bfff;
  --brand-hover: #33ccff;
  --accent: #ff4500;

  --border: rgba(255,255,255,0.12);
  --shadow: 0 12px 28px rgba(0,0,0,0.4);

  --radius: 14px;
  --max-width: 1100px;
  --readable: 820px;
}

/* ---------- Reset ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  min-height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(0,191,255,0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 10%, rgba(255,69,0,0.14), transparent 55%),
    var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 18px;
}

.readable {
  max-width: var(--readable);
  margin: 0 auto;
}

section {
  padding: 24px 0;
}

/* ---------- Typography ---------- */
h1 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  color: var(--accent);
  text-align: center;
  margin-bottom: 12px;
}

h2 {
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  color: var(--text);
  text-align: center;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

p {
  color: var(--muted);
  margin-bottom: 14px;
}

/* ---------- Links ---------- */
a {
  text-decoration: none;
}

a:visited {
  color: inherit;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.18);
  background: var(--brand);
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease, box-shadow 0.12s ease;
  box-shadow: var(--shadow);
}

.btn:hover {
  background: var(--brand-hover);
  transform: translateY(-1px);
}

.btn.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn.secondary:hover {
  background: rgba(255,255,255,0.06);
}

.btn.accent {
  background: var(--accent);
}

.btn.accent:hover {
  background: #ff6a33;
}

/* ---------- Header / Nav ---------- */
.site-header {
  background: rgba(21,26,34,0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

/* Logo banner */
.site-logo {
  width: 100%;
  max-width: 640px;
  height: auto;
  border-radius: 12px;
  object-fit: contain;
}

/* Nav */
.main-nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.main-nav a {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
}

.main-nav a:hover {
  background: var(--brand);
  color: #ffffff;
}

/* ---------- Cards / Panels ---------- */
.card,
.panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

/* ---------- Lists ---------- */
.list-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.list-group a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text);
}

.list-group a:hover {
  background: rgba(0,191,255,0.15);
}

/* ---------- Forms ---------- */
form {
  max-width: 680px;
  margin: 0 auto;
}

label {
  display: block;
  margin: 12px 0 6px;
  font-weight: 600;
}

input,
textarea,
select {
  width: 100%;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.35);
  color: var(--text);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(0,191,255,0.25);
}

/* ---------- Login ---------- */
.login-container {
  max-width: 460px;
  margin: 60px auto;
  padding: 26px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 60px;
  padding: 26px 16px;
  background: rgba(21,26,34,0.92);
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-links {
  margin-top: 10px;
  display: flex;
  gap: 14px;
  justify-content: center;
}

.footer-links a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
}

.footer-links a:hover {
  background: var(--brand);
  color: #ffffff;
}

/* =========================================================
   ADMIN UI POLISH (UNCHANGED)
   ========================================================= */

body {
  background-color: #0f1218;
}

.admin h1,
.admin h2,
.admin h3 {
  color: #ffffff;
  margin-bottom: 12px;
}

.admin .card,
.admin .panel,
.admin form {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 22px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

.admin label {
  font-weight: 700;
  color: #e9edf5;
  margin-top: 14px;
  display: block;
}

.admin input,
.admin textarea,
.admin select {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(0,0,0,0.35);
  color: #ffffff;
  font-size: 0.95rem;
}

.admin input:focus,
.admin textarea:focus,
.admin select:focus {
  border-color: #00bfff;
  box-shadow: 0 0 0 3px rgba(0,191,255,0.25);
  outline: none;
}

.admin .btn,
.admin button,
.admin input[type="submit"] {
  background: #00bfff;
  color: #001018;
  border: none;
  padding: 10px 18px;
  border-radius: 12px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .12s ease, background .12s ease;
}

.admin .btn:hover,
.admin button:hover,
.admin input[type="submit"]:hover {
  background: #33ccff;
  transform: translateY(-1px);
}

.admin .btn-danger,
.admin .btn-outline-danger {
  background: #ff4500;
  color: #140400;
}

.admin .btn-danger:hover {
  background: #ff5f1f;
}

.admin table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

.admin th,
.admin td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  color: #e9edf5;
}

.admin th {
  text-align: left;
  font-weight: 800;
  background: rgba(255,255,255,0.05);
}

.admin .error,
.admin .alert-danger {
  background: rgba(255,69,0,0.15);
  border-left: 4px solid #ff4500;
  padding: 12px;
  margin-bottom: 16px;
  border-radius: 8px;
  color: #ffd5c4;
}

.admin .success,
.admin .alert-success {
  background: rgba(0,191,255,0.15);
  border-left: 4px solid #00bfff;
  padding: 12px;
  margin-bottom: 16px;
  border-radius: 8px;
  color: #d6f3ff;
}

/* =========================================================
   RESPONSIVE REFINEMENTS (SAFE ADDITIONS)
   ========================================================= */

/* Tablet */
@media (max-width: 900px) {
  .site-logo {
    max-width: 520px;
  }

  .main-nav a {
    padding: 8px 14px;
    font-size: 0.95rem;
  }
}

/* Mobile */
@media (max-width: 600px) {
  .header-inner {
    padding: 12px 14px;
    gap: 10px;
  }

  .site-logo {
    max-width: 100%;
  }

  .main-nav {
    width: 100%;
    flex-direction: column;
    gap: 8px;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 10px 14px;
    border-radius: 12px;
  }
}

/* =========================================================
   Mobile Hamburger Nav (FIXED)
   ========================================================= */

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.2rem;
  padding: 6px 12px;
  border-radius: 10px;
  cursor: pointer;
}

@media (max-width: 600px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 8px;
  }

  .main-nav.is-open {
    display: flex;
  }
}