:root {
  --gradient-start: #000000;
  --gradient-end: #1a1a1a;
  --circle-color: rgba(255, 255, 255, 0.1);
  --button-gradient-start: #000000;
  --button-gradient-end: #000000;
  --button-text-color: #ffffff;
  --font: 'Kanit', sans-serif;
  --text-color: #ffffff;
  --accent-color: #ff4d4d; /* สีแดง Pitbull */
}

/* 🌞 Light Theme Variables */
.light-theme {
  --gradient-start: #f0f0f0;
  --gradient-end: #d9d9d9;
  --circle-color: rgba(0, 0, 0, 0.05);
  --button-gradient-start: #ffffff;
  --button-gradient-end: #e0e0e0;
  --button-text-color: #000000;
  --text-color: #000000;
}

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

/* Main Layout */
html, body {
  height: 100%;
  width: 100%;
  overflow: hidden; /* ล็อคหน้าจอไม่ให้เลื่อน (สำหรับหน้าแรก) */
  font-family: var(--font);
  color: var(--text-color);
  position: relative;
  background-color: transparent !important; 
}

/* Light Glow Bottom */
body::after {
  content: "";
  position: fixed;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 300px;
  background: radial-gradient(circle at center top, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 70%);
  filter: blur(80px);
  z-index: 1;
  pointer-events: none;
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 25px;
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50px;
  width: 50px;
  height: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  transition: all 0.3s ease;
}
.theme-toggle:hover {
  background: rgba(255,255,255,0.15);
  transform: scale(1.05);
}
.theme-toggle svg {
  color: var(--text-color);
  position: absolute;
  transition: opacity 0.3s ease;
}
#sunIcon { opacity: 0; }
.light-theme #moonIcon { opacity: 0; }
.light-theme #sunIcon { opacity: 1; }

/* Loading screen */
#loading-screen {
  position: fixed;
  width: 100%;
  height: 100%;
  background: #000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 999;
  transition: opacity 1s ease;
}
#loading-screen.hidden { opacity: 0; pointer-events: none; }

.loader {
  border: 4px solid rgba(255,255,255,0.1);
  border-top: 4px solid #888;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

/* =========================================
   🔥 ส่วนที่อัปเกรดใหม่: Design Cinematic
   ========================================= */

/* จัดกึ่งกลาง */
.center-container {
  position: absolute;
  top: 50%; 
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 5;
  width: 100%;
  padding: 0 20px;
}

/* หัวข้อ Pitbull Gang (ใหญ่ + เงาแดง) */
.title h2 {
  font-size: 4.5rem;
  font-weight: 900;
  font-style: italic;
  text-transform: uppercase;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 5px;
  
  /* เอฟเฟกต์นีออนสีแดง */
  text-shadow: 0 0 10px rgba(255, 77, 77, 0.8),
               0 0 40px rgba(255, 77, 77, 0.4);
}

/* หัวข้อรอง (ตัวเล็กห่างๆ) */
.title p {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 8px; /* เว้นระยะห่าง */
  margin-bottom: 40px;
  text-shadow: 0 0 10px rgba(0,0,0,0.8);
  opacity: 0.9;
}

/* ปุ่มกดสไตล์ Dark Glass */
button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  
  width: 240px; /* ความกว้างคงที่ */
  padding: 14px 0;
  margin: 0; /* ลบ margin เดิมออก */
  
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  
  background: rgba(0, 0, 0, 0.6); /* พื้นหลังดำโปร่งใส */
  backdrop-filter: blur(10px);
  
  border: 1px solid rgba(255, 255, 255, 0.15); /* ขอบขาวจางๆ */
  color: #fff;
  border-radius: 4px;
  
  cursor: pointer;
  overflow: hidden;
  transition: all 0.4s ease;
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

/* เอฟเฟกต์ตอนชี้ปุ่ม */
button:hover {
  background: var(--accent-color); /* สีแดง */
  border-color: var(--accent-color);
  box-shadow: 0 0 30px rgba(255, 77, 77, 0.6); /* เรืองแสง */
  transform: translateY(-3px) scale(1.02);
}

button svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  transition: transform 0.3s ease;
}

button:hover svg {
  transform: translateX(5px);
}

/* ========================================= */

/* Circle Follow */
#circle {
  position: fixed;
  top: 0; left: 0;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: var(--circle-color);
  pointer-events: none;
  filter: blur(80px);
  transform: translate(-50%, -50%);
  z-index: 2;
}

/* Footer */
footer {
  position: fixed;
  bottom: 15px;
  left: 0;
  width: 100%;
  text-align: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  z-index: 5;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 600px) {
  .title h2 { font-size: 2.5rem; }
  .title p { letter-spacing: 4px; font-size: 0.8rem; }
  button { width: 100%; max-width: 280px; }
  #circle { width: 180px; height: 180px; filter: blur(50px); }
}

/* Video Background */
#bg-video {
  position: fixed;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  z-index: -100;
  object-fit: cover;
}