@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Outfit:wght@500;600;700&family=Fira+Code:wght@400;500&display=swap');

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

:root {
  /* Premium Dark Space Palette */
  --bg: #06090f;
  --bg2: rgba(255, 255, 255, 0.02);
  
  /* Glassmorphism settings */
  --glass-bg: rgba(16, 21, 33, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(20px);
  
  /* Accent Colors: Cyber Cyan & Purple */
  --pri: #00F2FE;
  --prih: #4FACFE;
  --pri-glow: rgba(0, 242, 254, 0.4);
  --pri3: rgba(0, 242, 254, 0.1);
  
  --sec: #b05cff; /* Secondary neon purple */
  
  /* Status Colors */
  --grn: #2dd4bf;
  --grn3: rgba(45, 212, 191, 0.15);
  --red: #f43f5e;
  --red3: rgba(244, 63, 94, 0.15);
  --yel: #fbbf24;
  --yel3: rgba(251, 191, 36, 0.15);
  --cyan: #38bdf8;
  --cyan3: rgba(56, 189, 248, 0.15);
  
  /* Text */
  --txt: #f8fafc;
  --txt2: #94a3b8;
  --txt3: #64748b;
  
  /* Layout */
  --r: 12px;
  --r2: 8px;
  --max-w: 1300px;
  --card-pad: 20px;
  --border: var(--glass-border);
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg);
  /* Animated ambient background */
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(0, 242, 254, 0.08), transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(176, 92, 255, 0.08), transparent 50%);
  background-attachment: fixed;
  color: var(--txt);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ═══ TYPOGRAPHY ═══ */
h1, h2, h3 { font-family: 'Outfit', sans-serif; font-weight: 600; letter-spacing: 0.5px; }
code, .mono { font-family: 'Fira Code', 'Consolas', monospace; font-size: 13px; }

/* ═══ LAYOUT ═══ */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px; min-width: 260px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 24px 0;
  position: sticky; top: 0; height: 100vh;
  z-index: 100;
  box-shadow: 5px 0 30px rgba(0,0,0,0.2);
}
.sidebar-brand {
  padding: 0 24px 24px; border-bottom: 1px solid var(--border); margin-bottom: 16px;
}
.sidebar-brand h1 { 
  font-size: 20px; color: #fff; display: flex; align-items: center; gap: 10px;
  text-shadow: 0 0 10px var(--pri-glow);
}
.sidebar-brand p { font-size: 12px; color: var(--txt2); margin-top: 4px; font-weight: 500; }
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 6px; padding: 0 14px; }
.sidebar-footer { padding: 16px 24px 0; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 12px; }

.main-content { flex: 1; min-width: 0; padding: 30px 40px; max-width: 1200px; margin: 0 auto; width: 100%; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 30px 20px; }

/* ═══ LOGIN ═══ */
.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 48px 40px; width: 400px; text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.1);
  position: relative;
  overflow: hidden;
}
.login-box::before {
  content: ''; position: absolute; top: -50px; left: -50px; right: -50px; height: 100px;
  background: radial-gradient(ellipse at top, var(--pri-glow), transparent 70%);
  opacity: 0.5; pointer-events: none;
}
.login-box h1 { font-size: 28px; margin-bottom: 8px; color: #fff; }
.login-box p { color: var(--txt2); font-size: 14px; margin-bottom: 30px; }

/* ═══ INPUTS ═══ */
input, select, textarea {
  padding: 12px 16px;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--r2);
  color: var(--txt);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  width: 100%;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--pri);
  background: rgba(0,0,0,0.4);
  box-shadow: 0 0 0 3px var(--pri3), inset 0 2px 4px rgba(0,0,0,0.2);
}
textarea { resize: vertical; min-height: 80px; }
select { cursor: pointer; }
select option { background: var(--bg); color: var(--txt); }

/* ═══ BUTTONS ═══ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border: 1px solid transparent; border-radius: var(--r2);
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.3s ease;
  font-family: inherit; text-decoration: none;
  position: relative; overflow: hidden;
}
.btn:active { transform: scale(0.97); }
.btn svg { flex-shrink: 0; }

.btn-pri {
  background: linear-gradient(135deg, var(--pri), var(--prih));
  color: #000; /* High contrast text on neon bg */
  border: none;
  box-shadow: 0 4px 15px var(--pri-glow);
  font-weight: 700;
}
.btn-pri:hover {
  box-shadow: 0 6px 20px var(--pri-glow);
  transform: translateY(-1px);
}
.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 6px; }

.btn-red { background: var(--red3); color: var(--red); border-color: rgba(244,63,94,0.3); }
.btn-red:hover { background: rgba(244,63,94,0.25); box-shadow: 0 4px 12px rgba(244,63,94,0.2); }

.btn-grn { background: var(--grn3); color: var(--grn); border-color: rgba(45,212,191,0.3); }
.btn-grn:hover { background: rgba(45,212,191,0.25); box-shadow: 0 4px 12px rgba(45,212,191,0.2); }

.btn-ghost { background: transparent; color: var(--txt2); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--txt); color: var(--txt); background: rgba(255,255,255,0.05); }

.btn-cyan { background: var(--cyan3); color: var(--cyan); border-color: rgba(56,189,248,0.3); }
.btn-cyan:hover { background: rgba(56,189,248,0.25); box-shadow: 0 4px 12px rgba(56,189,248,0.2); }

.btn-yel { background: var(--yel3); color: var(--yel); border-color: rgba(251,191,36,0.3); }
.btn-yel:hover { background: rgba(251,191,36,0.25); }

/* ═══ SIDEBAR TABS (vertical) ═══ */
.tabs { display: flex; flex-direction: column; gap: 4px; }
.tab {
  padding: 12px 16px; font-size: 14px; font-weight: 500; color: var(--txt2);
  cursor: pointer; text-decoration: none;
  border-radius: var(--r2);
  transition: all 0.2s ease;
  display: flex; align-items: center; gap: 12px;
  position: relative;
}
.tab:hover { color: #fff; background: rgba(255,255,255,0.04); }
.tab.active { color: var(--pri); background: var(--pri3); font-weight: 600; }
.tab.active::before {
  content: ''; position: absolute; left: 0; top: 20%; bottom: 20%; width: 3px;
  background: var(--pri); border-radius: 0 4px 4px 0;
  box-shadow: 0 0 10px var(--pri);
}
.tab svg { flex-shrink: 0; opacity: 0.8; transition: opacity 0.2s; }
.tab.active svg { opacity: 1; filter: drop-shadow(0 0 5px var(--pri-glow)); }

.nav-group-label {
  font-family: 'Outfit', sans-serif;
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--txt3); padding: 12px 16px 8px; display: flex; align-items: center; gap: 8px;
}

/* ═══ CARDS ═══ */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--r);
  padding: var(--card-pad); margin-bottom: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover { box-shadow: 0 15px 40px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.08); }
.card h2 {
  font-size: 18px; margin-bottom: 16px;
  display: flex; align-items: center; gap: 10px;
  color: #fff; border-bottom: 1px solid var(--border); padding-bottom: 12px;
}

/* ═══ FORM GROUPS ═══ */
.fg { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.fg label { 
  font-family: 'Outfit', sans-serif;
  font-size: 12px; color: var(--txt2); font-weight: 600; text-transform: uppercase; 
  letter-spacing: 0.5px; display: flex; align-items: center; gap: 6px; 
}

/* ═══ ALERTS ═══ */
.alert {
  padding: 14px 18px; border-radius: var(--r2); margin-bottom: 20px; font-size: 14px;
  white-space: pre-wrap; animation: slideIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex; align-items: flex-start; gap: 10px;
  backdrop-filter: blur(10px);
}
@keyframes slideIn { from { opacity: 0; transform: translateY(-10px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.alert-success, .alert-s { background: var(--grn3); border: 1px solid rgba(45,212,191,0.3); color: var(--grn); box-shadow: 0 4px 20px rgba(45,212,191,0.1); }
.alert-error { background: var(--red3); border: 1px solid rgba(244,63,94,0.3); color: #fff; box-shadow: 0 4px 20px rgba(244,63,94,0.1); text-shadow: 0 1px 2px rgba(0,0,0,0.5);}

/* ═══ DROP ZONE ═══ */
.drop-zone {
  border: 2px dashed rgba(255,255,255,0.15); border-radius: var(--r);
  padding: 50px 20px; text-align: center; transition: all 0.3s ease; cursor: pointer;
  background: rgba(0,0,0,0.2);
}
.drop-zone:hover, .drop-zone.over { border-color: var(--pri); background: rgba(0, 242, 254, 0.05); transform: scale(1.01); }
.drop-zone svg { color: var(--pri); margin-bottom: 12px; filter: drop-shadow(0 0 8px var(--pri-glow)); }
.drop-zone p { color: #fff; font-size: 15px; font-weight: 500; }
.drop-zone .hint { color: var(--txt3); font-size: 13px; margin-top: 6px; }

/* ═══ FILE LIST ═══ */
.file-list { margin-top: 12px; display: flex; flex-direction: column; gap: 6px; }
.file-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  background: rgba(255,255,255,0.03); border: 1px solid var(--border);
  border-radius: var(--r2); font-size: 14px; animation: slideIn 0.2s ease;
}
.file-item .fi-name { flex: 1; font-family: 'Fira Code', monospace; font-size: 13px; color: var(--pri); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .fi-size { color: var(--txt3); font-size: 12px; }
.file-item .fi-remove { color: var(--red); cursor: pointer; font-size: 16px; padding: 4px; border-radius: 4px; transition: 0.2s; display: flex; align-items: center; }
.file-item .fi-remove:hover { background: var(--red3); transform: scale(1.1); }

/* ═══ PACK GRID ═══ */
.pack-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.pack-card {
  background: var(--glass-bg); backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border); border-radius: var(--r);
  padding: 20px; transition: all 0.3s ease; position: relative; overflow: hidden;
}
.pack-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--pri), var(--sec)); opacity: 0; transition: 0.3s;
}
.pack-card:hover { border-color: rgba(255,255,255,0.15); transform: translateY(-4px); box-shadow: 0 15px 30px rgba(0,0,0,0.4); }
.pack-card:hover::before { opacity: 1; }
.pack-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.pack-id { font-family: 'Outfit', sans-serif; font-size: 18px; font-weight: 700; color: #fff; text-shadow: 0 0 10px rgba(255,255,255,0.2); }
.pack-date { font-size: 12px; color: var(--txt3); display: flex; align-items: center; gap: 6px; }
.pack-note {
  background: rgba(0,0,0,0.3); padding: 10px 14px; border-radius: var(--r2); font-size: 13px;
  color: var(--txt2); margin-bottom: 16px; border-left: 3px solid var(--pri); line-height: 1.6;
}
.pack-files { margin-bottom: 16px; background: rgba(255,255,255,0.02); border-radius: var(--r2); border: 1px solid var(--border); }
.pack-file {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px; font-size: 13px;
  border-bottom: 1px solid var(--border);
}
.pack-file:last-child { border-bottom: none; }
.pack-file .pf-name { flex: 1; font-family: 'Fira Code', monospace; color: var(--pri); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pack-file .pf-size { color: var(--txt3); font-size: 11px; }
.pack-file .pf-badge {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 10px; font-weight: 700; background: var(--pri3); color: var(--pri);
  letter-spacing: 0.5px;
}
.pack-actions { display: flex; gap: 8px; }
.pack-stats { display: flex; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.stat { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--txt3); }
.stat b { color: #fff; }

/* ═══ BADGE ═══ */
.badge { display: inline-block; padding: 4px 10px; border-radius: 6px; font-size: 11px; font-weight: 700; background: var(--pri3); color: var(--pri); letter-spacing: 0.5px; }

/* ═══ EMPTY STATE ═══ */
.empty-state { text-align: center; padding: 60px 20px; color: var(--txt3); }
.empty-state svg { margin-bottom: 16px; opacity: 0.5; color: var(--txt2); filter: drop-shadow(0 0 10px rgba(255,255,255,0.1)); }
.empty-state p { font-size: 16px; font-weight: 500; }

/* ═══ FILEINFO BOX & OUT BOX ═══ */
.fi-box, .out-box {
  background: #0a0e14; padding: 14px 16px; border-radius: var(--r2);
  font-family: 'Fira Code', monospace; font-size: 13px;
  color: var(--pri); word-break: break-all; white-space: pre-wrap;
  border: 1px solid var(--border); max-height: 150px; overflow-y: auto;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.5);
}
.out-box { max-height: 400px; color: var(--grn); }

/* ═══ SETTINGS SWITCH ═══ */
.stg-toggle { display: flex; align-items: center; gap: 12px; }
.stg-hint { font-size: 12px; color: var(--txt3); margin-top: 4px; }
.switch { position: relative; display: inline-block; width: 44px; height: 24px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.1); border-radius: 24px; transition: 0.3s;
  border: 1px solid rgba(255,255,255,0.05);
}
.slider::before {
  content: ''; position: absolute; height: 16px; width: 16px; left: 4px; bottom: 3px;
  background: #fff; border-radius: 50%; transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}
.switch input:checked + .slider { background: var(--pri); box-shadow: 0 0 10px var(--pri-glow); border-color: var(--pri); }
.switch input:checked + .slider::before { transform: translateX(20px); }

input[type=range] { -webkit-appearance: none; height: 6px; background: rgba(255,255,255,0.1); border-radius: 6px; border: none; outline: none; padding: 0; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--pri); cursor: pointer; box-shadow: 0 0 10px var(--pri-glow); transition: 0.2s; }
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.1); }

.mapping-row {
  display: flex; align-items: center; gap: 12px; margin-bottom: 8px; padding: 10px 14px;
  background: rgba(255,255,255,0.02); border: 1px solid var(--border); border-radius: var(--r2);
  animation: slideIn 0.2s ease;
}
.mapping-del { color: var(--red); cursor: pointer; padding: 6px; border-radius: 6px; transition: 0.2s; display: flex; align-items: center; }
.mapping-del:hover { background: var(--red3); transform: scale(1.1); }

/* ═══ HEX EDITOR ═══ */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; padding: 12px 16px; background: rgba(0,0,0,0.2); border: 1px solid var(--border); border-radius: var(--r2); }
.toolbar input { width: 160px; padding: 8px 12px; font-size: 13px; background: rgba(255,255,255,0.05); }
.toolbar .btn { padding: 8px 14px; font-size: 13px; }
.toolbar select { width: auto; padding: 8px 12px; font-size: 13px; background: rgba(255,255,255,0.05); }

.file-info { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 16px; font-size: 14px; color: var(--txt2); background: rgba(255,255,255,0.02); padding: 10px 16px; border-radius: var(--r2); border: 1px solid var(--border); }
.file-info b { color: #fff; }

.hex-wrap { overflow: auto; max-height: 65vh; background: #080b10; border: 1px solid var(--border); border-radius: var(--r2); box-shadow: inset 0 5px 20px rgba(0,0,0,0.5); }
.hex-wrap::-webkit-scrollbar { width: 10px; height: 10px; }
.hex-wrap::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); }
.hex-wrap::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 5px; }
.hex-wrap::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

.hex-table { border-collapse: collapse; width: 100%; font-family: 'Fira Code', monospace; font-size: 14px; }
.hex-table th { position: sticky; top: 0; background: #0f151f; padding: 8px 6px; font-size: 11px; color: var(--txt3); border-bottom: 1px solid rgba(255,255,255,0.1); text-align: center; z-index: 2; font-weight: 600; letter-spacing: 1px; }
.hex-table td { padding: 4px 6px; text-align: center; border-bottom: 1px solid rgba(255,255,255,0.02); }
.hex-table tr:hover td { background: rgba(255,255,255,0.02); }
.hex-table .off { color: var(--txt3); text-align: right; padding-right: 14px; user-select: none; min-width: 80px; font-weight: 500; }
.hex-table .sep { width: 12px; background: rgba(255,255,255,0.02); }
.hex-table .hx { color: #e2e8f0; cursor: pointer; min-width: 26px; border-radius: 4px; transition: 0.1s; }
.hex-table .hx:hover { background: var(--pri3); color: var(--pri); outline: 1px solid var(--pri); }
.hex-table .hx.sel { background: rgba(0, 242, 254, 0.2); color: var(--pri); box-shadow: 0 0 10px rgba(0, 242, 254, 0.2); font-weight: 600; }
.hex-table .hx.mod { color: var(--yel); font-weight: 700; text-shadow: 0 0 5px var(--yel); }
.hex-table .hx.zero { color: var(--txt3); opacity: 0.4; }
.hex-table .asc { color: var(--sec); text-align: left; padding-left: 14px; letter-spacing: 0; white-space: pre; cursor: pointer; font-weight: 500; }
.hex-table .asc .ac { display: inline-block; width: 10px; text-align: center; border-radius: 2px; transition: 0.1s; cursor: pointer; }
.hex-table .asc .ac:hover { background: rgba(176, 92, 255, 0.2); color: #fff; }
.hex-table .asc .ac.mod { color: var(--yel); font-weight: 700; text-shadow: 0 0 5px var(--yel); }
.hex-table .asc .dot { color: var(--txt3); opacity: 0.3; }
.hex-table .asc .hl { background: var(--pri3); color: var(--pri); }
.hex-table .asc .asel { background: var(--yel3); color: var(--yel); }

.hex-edit-input { position: absolute; width: 32px; font-size: 14px; font-family: 'Fira Code', monospace; background: var(--pri); color: #000; font-weight: 700; border: none; text-align: center; padding: 2px; border-radius: 4px; z-index: 10; text-transform: uppercase; box-shadow: 0 0 15px var(--pri-glow); outline: none; }
.asc-edit-input { position: absolute; font-size: 14px; font-family: 'Fira Code', monospace; background: var(--sec); color: #000; font-weight: 700; border: none; padding: 2px 4px; border-radius: 4px; z-index: 10; min-width: 44px; box-shadow: 0 0 15px rgba(176, 92, 255, 0.4); outline: none; text-align: center; }

.replace-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 12px 16px; background: rgba(45, 212, 191, 0.05); border: 1px solid rgba(45, 212, 191, 0.15); border-radius: var(--r2); margin-top: 12px; }
.replace-row input { width: 200px; padding: 8px 12px; font-size: 13px; background: rgba(0,0,0,0.3); }
.replace-row .btn { padding: 8px 14px; font-size: 13px; }
.replace-row label { font-family: 'Outfit', sans-serif; font-size: 12px; color: var(--grn); font-weight: 600; display: flex; align-items: center; gap: 6px; text-transform: uppercase; letter-spacing: 0.5px; }

.stat-bar { display: flex; gap: 20px; padding: 10px 16px; background: rgba(255,255,255,0.02); border: 1px solid var(--border); border-radius: var(--r2); font-size: 12px; color: var(--txt2); margin-top: 12px; flex-wrap: wrap; }
.stat-bar b { color: #fff; font-family: 'Fira Code', monospace; font-size: 13px; }

.mobile-header { display: none; }
.sidebar-overlay { display: none; }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 900px) {
  .app-layout { display: block; }
  
  .mobile-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 90;
  }
  .menu-btn {
    background: transparent; border: none; color: var(--txt); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    padding: 8px; border-radius: 8px; transition: 0.2s;
  }
  .menu-btn:hover { background: rgba(255,255,255,0.1); }
  
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
    width: 280px; min-width: 280px; height: 100vh;
    transform: translateX(-100%); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .sidebar.open { transform: translateX(0); }
  
  .sidebar-overlay {
    display: block;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    z-index: 95; opacity: 0; visibility: hidden; transition: 0.3s;
  }
  .sidebar-overlay.open { opacity: 1; visibility: visible; }
  
  .main-content { padding: 20px 16px; }
  .container { padding: 20px 16px; }
}

/* SVG icon utilities */
svg.spin { animation: spin 1s linear infinite; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
svg { vertical-align: middle; flex-shrink: 0; }