:root {
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --mac-blue: #007AFF;
  --mac-blue-hover: #006CE6;
  --mac-focus-ring: rgba(0, 122, 255, 0.4);
  --mac-green: #34C759;
  --mac-red: #FF3B30;
  --mac-yellow: #FFBD2E;

  /* ================= LIGHT THEME ================= */
  --glass-bg-window: rgba(255, 255, 255, 0.65);
  --glass-bg-sidebar: rgba(245, 245, 247, 0.65);
  --glass-bg-card: rgba(255, 255, 255, 0.55);

  --glass-border-outer: rgba(0, 0, 0, 0.15); /* Borda Externa Rígida */
  --glass-border-inner: rgba(0, 0, 0, 0.06); /* Divisões Internas Suaves */
  --glass-highlight-top: inset 0 1px 0 rgba(255, 255, 255, 0.9); /* O Reflexo da Luz no topo */
  --glass-shadow: 0 12px 36px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.04);
  
  --text-primary: #1C1C1E;
  --text-secondary: #8E8E93;

  --control-bg: rgba(255, 255, 255, 0.85);
  --control-border: rgba(0, 0, 0, 0.12);
  
  --bg-page: #f8fafc;
  --spotlight-color: rgba(37, 99, 235, 0.1);
  --grid-color: rgba(0, 0, 0, 0.05);
  --avatar-border: rgba(0, 0, 0, 0.05);
}

:root[data-theme="dark"] {
  /* ================= DARK THEME ================= */
  --glass-bg-window: rgba(30, 30, 30, 0.65);
  --glass-bg-sidebar: rgba(20, 20, 20, 0.65);
  --glass-bg-card: rgba(40, 40, 40, 0.55);

  --glass-border-outer: rgba(255, 255, 255, 0.15);
  --glass-border-inner: rgba(255, 255, 255, 0.08);
  --glass-highlight-top: inset 0 1px 0 rgba(255, 255, 255, 0.15);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.2);

  --text-primary: #FFFFFF;
  --text-secondary: rgba(235, 235, 245, 0.6);

  --control-bg: rgba(255, 255, 255, 0.1);
  --control-border: rgba(255, 255, 255, 0.12);

  --bg-page: #050505;
  --spotlight-color: rgba(37, 99, 235, 0.15);
  --grid-color: rgba(255, 255, 255, 0.08);

  --avatar-border: rgba(255, 255, 255, 0.1);
}

/* Base Body Styles */
body {
    background-color: var(--bg-page);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
    position: relative;
    font-family: var(--font-system);
    margin: 0; padding: 0; box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

* { box-sizing: border-box; -webkit-font-smoothing: antialiased; }

/* The Glass Wrapper */
.tahoe-app {
  border-radius: 18px; /* Squircle da Apple */
  overflow: hidden;
  
  /* O Motor de Blur */
  background: var(--glass-bg-window);
  backdrop-filter: blur(45px) saturate(220%);
  -webkit-backdrop-filter: blur(45px) saturate(220%); /* Crucial para Safari */

  /* Estrutura 3D */
  border: 1px solid var(--glass-border-outer);
  box-shadow: var(--glass-shadow), var(--glass-highlight-top);
  
  position: relative;
}

/* O Traffic Light (Controles de Janela macOS) */
.tahoe-titlebar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--glass-border-inner);
    background: transparent;
}
.traffic-group {
    display: flex;
    gap: 8px;
}
.traffic-light {
  width: 12px; height: 12px; border-radius: 50%;
  border: 0.5px solid rgba(0, 0, 0, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
  display: inline-block;
}
.traffic-light.close { background-color: var(--mac-red); }
.traffic-light.min { background-color: var(--mac-yellow); }
.traffic-light.max { background-color: var(--mac-green); }

/* Cards & Grids */
.tahoe-card {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border-inner);
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04), var(--glass-highlight-top);
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), background 0.2s, box-shadow 0.2s;
  text-decoration: none;
  display: flex;
  color: var(--text-primary);
}

.tahoe-card:hover {
  background: var(--glass-bg-window);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1), var(--glass-highlight-top);
}

/* UI Controls */
.tahoe-btn {
    background: var(--control-bg);
    border: 1px solid var(--control-border);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    transition: transform 0.1s, background 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.tahoe-btn:active {
    transform: scale(0.96);
    background: var(--glass-bg-card);
}

/* Inputs */
.tahoe-input {
    background: var(--glass-bg-card);
    border: 1px solid var(--control-border);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.tahoe-input:focus {
  border-color: var(--mac-blue);
  box-shadow: 0 0 0 3px var(--mac-focus-ring);
}

/* Pop-ups Extremos */
.tahoe-extreme-popup {
  background: var(--glass-bg-card);
  backdrop-filter: blur(40px) saturate(250%) !important;
  -webkit-backdrop-filter: blur(40px) saturate(250%) !important;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25), var(--glass-highlight-top);
  border-radius: 12px;
  border: 1px solid var(--glass-border-inner);
}

/* ================= MOBILE GLOBAL ================= */
@media (max-width: 480px) {
    .tahoe-app {
        border-radius: 14px;
    }
    .tahoe-titlebar {
        padding: 12px;
    }
    .tahoe-card {
        border-radius: 12px;
    }
}