/* =========================================================
   main.css — Layout generale e variabili globali
   3DVolleyAnalysis
   ========================================================= */

/* ----- CSS Variables ----- */
:root {
  --bg-base:        #0a0d12;
  --bg-surface:     #111620;
  --bg-panel:       #151b26;
  --bg-hover:       #1c2535;
  --bg-active:      #1f3050;

  --accent:         #F35EF7;
  --accent-dim:     #b830bc;
  --accent-glow:    rgba(243, 94, 247, 0.18);

  --green:          #00e58a;
  --green-dim:      rgba(0, 229, 138, 0.15);
  --red:            #ff4466;
  --yellow:         #ffd64a;

  --text-primary:   #e8edf5;
  --text-secondary: #7a8ba0;
  --text-muted:     #3d4f62;

  --border:         #1e2d3d;
  --border-accent:  rgba(243, 94, 247, 0.3);

  --font-ui:        'Rajdhani', sans-serif;
  --font-mono:      'Source Code Pro', monospace;

  --radius-sm:      4px;
  --radius-md:      8px;

  --header-h:       52px;
  --toolbar-w:      210px;
  --panel-w:        240px;
}

/* ----- Reset base ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 14px;
  letter-spacing: 0.02em;
}

/* ----- Scrollbar globale ----- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* =========================================================
   HEADER
   ========================================================= */
#app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-icon {
  color: var(--accent);
  font-size: 22px;
  line-height: 1;
  filter: drop-shadow(0 0 6px var(--accent));
}

.brand-title em {
  font-style: normal;
  color: var(--accent);
}

.header-session {
  display: flex;
  align-items: center;
  gap: 8px;
}

#session-label {
  color: var(--text-secondary);
  font-size: 12px;
  margin-right: 8px;
}

.btn-header {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-header:hover {
  background: var(--bg-active);
  border-color: var(--border-accent);
}

.btn-header.btn-accent {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-header.btn-accent:hover {
  background: var(--accent);
  color: var(--bg-base);
}

.btn-header:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* =========================================================
   LAYOUT PRINCIPALE
   ========================================================= */
#app-layout {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  display: grid;
  grid-template-columns: var(--toolbar-w) 1fr var(--panel-w);
  grid-template-rows: 1fr;
  overflow: hidden;
}

/* =========================================================
   MODAL
   ========================================================= */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-backdrop.hidden { display: none; }

.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  width: 420px;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0,0,0,0.6);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
}

.modal-body {
  padding: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  font-size: 13px;
}

.modal-grid-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 14px;
}

.modal-grid-info span {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 12px;
  color: var(--accent);
}

.modal-footer {
  padding: 14px 18px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  border-top: 1px solid var(--border);
}

.modal-footer button {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: 0.15s;
}

.modal-footer .btn-accent {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--bg-base);
}

.modal-footer .btn-accent:hover {
  background: var(--accent-dim);
  color: var(--text-primary);
}

.modal-footer button:not(.btn-accent) {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}