/* ========================= */
/* ===== THEME VARIABLES === */
/* ========================= */

:root {
  --bg-main: #0a0a0a;
  --bg-card: rgba(17, 17, 19, 0.88);
  --bg-card-hover: rgba(26, 26, 29, 0.96);
  --bg-input: #121214;
  --bg-image-brightness: 0.28;

  --text-main: #f8f9fa;
  --text-muted: #94a3b8;
  --text-strong: #ffffff;

  --border-main: rgba(255, 255, 255, 0.05);

  --logo-grad-start: #ffffff;
  --logo-grad-end: #94a3b8;

  --btn-primary: #ffffff;
  --btn-primary-text: #0a0a0a;
  --btn-secondary: transparent;
  --btn-secondary-border: #ffffff;
  --btn-danger: #ef4444;
  
  /* 비디오 전용 변수 */
  --accent-color: #ffffff;
  --progress-bg: rgba(255, 255, 255, 0.1);
}

/* ========================= */
/* ===== GLOBAL RESET ====== */
/* ========================= */

* {
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
}

body {
  margin: 0;
  background: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 배경 블러 효과 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, #0f172a 0%, #020617 100%);
  filter: brightness(var(--bg-image-brightness));
}

/* ========================= */
/* ===== NAVIGATION ======== */
/* ========================= */

.navbar {
  position: sticky;
  top: 15px;
  z-index: 100;
  max-width: 95%;
  margin: 20px auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 30px;
  background: var(--bg-card);
  backdrop-filter: blur(25px) saturate(180%);
  border-radius: 20px;
  border: 1px solid var(--border-main);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.logo a {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(to right, var(--logo-grad-start), var(--logo-grad-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 18px;
  border-radius: 12px;
  transition: 0.3s;
}

nav a.active, nav a:hover {
  color: var(--text-strong);
  background: var(--toggle-bg-hover);
}

/* ========================= */
/* ===== COMPONENTS ======== */
/* ========================= */

.admin-card {
  background: var(--bg-card);
  backdrop-filter: blur(25px) saturate(180%);
  border: 1px solid var(--border-main);
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.3);
}

/* 드래그 앤 드롭 존 */
.info-box {
  background: var(--bg-input);
  border: 2px dashed var(--border-main);
  border-radius: 20px;
  padding: 40px 20px;
  text-align: center;
  transition: all 0.3s ease;
}

.info-box:hover, .info-box.drag-over {
  border-color: var(--text-strong);
  background: var(--bg-card-hover);
}

.info-box h3 { color: var(--text-strong); margin-bottom: 8px; }
.info-box p { color: var(--text-muted); font-size: 14px; }

/* 업로드 진행 바 */
.progress-container {
  margin-top: 25px;
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: var(--progress-bg);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-color);
  width: 0%;
  transition: width 0.3s ease;
}

/* 버튼 스타일 */
.btn {
  display: inline-block;
  padding: 16px 32px;
  background: var(--btn-primary);
  color: var(--btn-primary-text);
  border-radius: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: 0.3s;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255,255,255,0.1);
}

/* 비디오 플레이어 래퍼 */
.video-wrapper {
  width: 100%;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border-main);
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
  background: #000;
}

video { width: 100%; display: block; }

/* ========================= */
/* ===== LAYOUT ============ */
/* ========================= */

.hero-container {
  max-width: 1200px;
  margin: 60px auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 0 20px;
}

@media (max-width: 900px) {
  .hero-container { grid-template-columns: 1fr; }
}

/* 공유 링크 입력창 */
.share-url-input {
  width: 100%;
  padding: 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-main);
  border-radius: 12px;
  color: var(--text-strong);
  font-family: monospace;
}

/* 목록 전용 스타일 */
.video-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.video-item {
    background: var(--bg-card);
    border: 1px solid var(--border-main);
    border-radius: 16px;
    padding: 20px;
    transition: 0.3s;
}

.video-item:hover {
    transform: translateY(-5px);
    border-color: var(--text-muted);
}

.video-item h4 {
    margin: 10px 0;
    font-size: 14px;
    word-break: break-all;
    color: var(--text-strong);
}

.video-stats {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 15px;
}