@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400&display=swap');

/* 
   TOKENS
 */
:root {
  --blue:         #0067b8;
  --blue-dark:    #005196;
  --blue-light:   #e8f1fb;
  --blue-mid:     #cce0f5;
  --ink:          #0f0f0f;
  --ink-2:        #1a1a1a;
  --ink-3:        #6a6a6a;
  --ink-4:        #8f8f8f;
  --border:       #e0e0e0;
  --border-2:     #ebebeb;
  --surface:      #ffffff;
  --surface-2:    #f5f5f5;
  --surface-3:    #f7f7f7;
  --danger:       #dc2626;
  --danger-light: #fef2f2;
  --success:      #16a34a;
  --success-light:#f0fdf4;

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  24px;
  --radius-full:9999px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 2px 12px rgba(0,0,0,.04), 0 1px 4px rgba(0,0,0,.02);
  --shadow-md: 0 4px 24px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.03);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.04);

  --ease: cubic-bezier(0.33, 1, 0.68, 1);
  --font: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* 
   RESET
 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; overscroll-behavior: none; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--surface-3);
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(0,103,184,.02) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0,103,184,.015) 0%, transparent 50%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,.008) 2px,
      rgba(0,0,0,.008) 4px
    );
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  overscroll-behavior-y: none;
  animation: pageReveal .4s var(--ease);
}
@keyframes pageReveal { from { opacity: 0; } to { opacity: 1; } }
img    { display: block; max-width: 100%; }
a      { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* 
   HEADER
 */
.sess-header {
  position: sticky; top: 0; z-index: 200;
  height: 66px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}
.sess-header-inner {
  max-width: 860px; margin: 0 auto;
  padding: 0 32px; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.sess-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 19px; font-weight: 800;
  letter-spacing: -.02em; color: var(--ink);
}
.sess-brand img {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1.5px solid rgba(0,0,0,.15);
}
.btn-back {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px;
  font-family: var(--font);
  font-size: 13.5px; font-weight: 600; color: var(--ink-3);
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface);
  transition: border-color .15s, color .15s, background .15s, transform .15s;
  cursor: pointer;
}
.btn-back svg { width: 14px; height: 14px; }
.btn-back:hover { border-color: var(--ink-3); color: var(--ink); background: var(--surface-2); transform: translateX(-2px); }

/* 
   PAGE
 */
.sess-page {
  max-width: 860px; margin: 0 auto;
  padding: 40px 32px 80px;
}

/* 
   TITLE ROW
 */
.sess-title-row {
  display: flex; align-items: center; gap: 18px;
  margin-bottom: 32px; flex-wrap: wrap;
}
.sess-title-icon {
  width: 52px; height: 52px; flex-shrink: 0;
  background: var(--blue-light);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
}
.sess-title-icon svg { width: 24px; height: 24px; stroke: var(--blue); }
.sess-title-text { flex: 1; }
.sess-title-text h1 {
  font-size: 1.6rem; font-weight: 800;
  letter-spacing: -.03em; color: var(--ink); line-height: 1.1;
}
.sess-title-text p { font-size: .9rem; color: var(--ink-3); margin-top: 4px; }

.btn-revoke-all {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 18px;
  font-family: var(--font);
  font-size: 13.5px; font-weight: 700;
  color: var(--danger);
  border: 1.5px solid #fca5a5;
  border-radius: var(--radius-sm);
  background: var(--danger-light);
  transition: background .15s, border-color .15s, transform .15s;
  white-space: nowrap;
}
.btn-revoke-all svg { width: 14px; height: 14px; }
.btn-revoke-all:hover { background: #fee2e2; border-color: var(--danger); transform: translateY(-1px); }
.btn-revoke-all:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* 
   LOADING
 */
.sess-loading {
  text-align: center; padding: 80px 24px;
  color: var(--ink-4);
}
.sess-spinner {
  width: 32px; height: 32px; margin: 0 auto 16px;
  border: 3px solid var(--border);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 
   SESSION LIST
 */
.sess-list {
  display: flex; flex-direction: column; gap: 12px;
}

/* 
   SESSION CARD
 */
.sess-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  display: flex; align-items: center; gap: 20px;
  transition: box-shadow .2s, border-color .2s, transform .2s;
  position: relative;
  overflow: hidden;
}
.sess-card::before {
  content: '';
  position: absolute;
  top: -40%; right: -30%;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(0,103,184,.03) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  transition: transform .4s var(--ease);
}
.sess-card:hover::before {
  transform: translate(-18px, 18px) scale(1.12);
}
.sess-card:hover { 
  box-shadow: var(--shadow-md); 
  border-color: #ccc; 
  transform: translateY(-2px); 
}

/* current session highlight */
.sess-card.current {
  border-color: var(--blue-mid);
  background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 60%);
  position: relative;
}
.sess-card.current::before {
  background: radial-gradient(circle, rgba(0,103,184,.05) 0%, transparent 70%);
}
.sess-card.current::after {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; 
  background: linear-gradient(180deg, var(--blue), var(--blue-dark));
  border-radius: 0 3px 3px 0;
}

/* device icon */
.sess-device-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
}
.sess-device-icon svg { width: 22px; height: 22px; stroke: var(--ink-3); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sess-card.current .sess-device-icon {
  background: var(--blue-light);
  border-color: var(--blue-mid);
}
.sess-card.current .sess-device-icon svg { stroke: var(--blue); }

/* info */
.sess-info { flex: 1; min-width: 0; }
.sess-info-top {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 6px; flex-wrap: wrap;
}
.sess-device-name {
  font-size: .95rem; font-weight: 700; color: var(--ink);
}
.sess-current-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px;
  background: var(--blue-light); color: var(--blue);
  border: 1px solid var(--blue-mid);
  border-radius: var(--radius-full);
  font-size: 11px; font-weight: 700;
  letter-spacing: .02em;
}
.sess-current-badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%; background: var(--blue);
  flex-shrink: 0;
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(.75); }
}

.sess-meta {
  display: flex; flex-wrap: wrap; gap: 6px 18px;
}
.sess-meta-item {
  display: flex; align-items: center; gap: 5px;
  font-size: .8rem; color: var(--ink-3);
}
.sess-meta-item svg { width: 13px; height: 13px; stroke: var(--ink-4); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

/* revoke button */
.btn-revoke {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; flex-shrink: 0;
  font-family: var(--font);
  font-size: 12.5px; font-weight: 600;
  color: var(--ink-3);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  transition: background .15s, color .15s, border-color .15s;
}
.btn-revoke svg { width: 13px; height: 13px; }
.btn-revoke:hover { background: var(--danger-light); color: var(--danger); border-color: #fca5a5; }
.btn-revoke:disabled { opacity: .4; cursor: not-allowed; }

/* 
   EMPTY STATE
 */
.sess-empty {
  background: var(--surface);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-xl);
  padding: 64px 32px;
  text-align: center;
}
.sess-empty-icon {
  width: 56px; height: 56px; margin: 0 auto 20px;
  background: var(--blue-light); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
}
.sess-empty-icon svg { width: 26px; height: 26px; stroke: var(--blue); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.sess-empty h3 { font-size: 1.1rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.sess-empty p  { font-size: .9rem; color: var(--ink-3); }

/* 
   TOAST
 */
.sess-toast {
  position: fixed; bottom: 28px; right: 28px; z-index: 600;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px;
  background: var(--ink); color: #fff;
  border-radius: var(--radius-md);
  font-size: 13.5px; font-weight: 600;
  box-shadow: var(--shadow-lg);
  transform: translateY(12px); opacity: 0;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
  pointer-events: none;
}
.sess-toast.show { transform: translateY(0); opacity: 1; }
.sess-toast.error { background: var(--danger); }
.sess-toast svg { width: 15px; height: 15px; flex-shrink: 0; }

/* 
   RESPONSIVE
 */
@media (max-width: 640px) {
  .sess-page { padding: 24px 16px 60px; }
  .sess-header-inner { padding: 0 16px; }
  .sess-card { flex-wrap: wrap; gap: 14px; }
  .btn-revoke { width: 100%; justify-content: center; }
  .sess-title-row { gap: 12px; }
  .btn-revoke-all { width: 100%; justify-content: center; }
}