:root {
  --primary: oklch(0.65 0.25 260);
  --success: oklch(0.65 0.25 150);
  --bg: oklch(0.98 0.01 260);
  --text: oklch(0.2 0.02 260);
  --white: oklch(1 0 0);
  --card-bg: oklch(1 0 0 / 0.8);
  --shadow: 0 10px 30px oklch(0 0 0 / 0.05);
  --radius: 20px;
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg);
  background-image: 
    radial-gradient(at 0% 0%, oklch(0.9 0.1 260 / 0.2) 0px, transparent 50%),
    radial-gradient(at 100% 100%, oklch(0.9 0.1 150 / 0.2) 0px, transparent 50%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
}

/* Texture effect */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: url('https://www.transparenttextures.com/patterns/cubes.png');
  opacity: 0.03;
  pointer-events: none;
  z-index: 100;
}

.app-container {
  width: 100%;
  max-width: 500px;
  padding: 20px;
  z-index: 10;
}

.view {
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.hidden { display: none !important; }

/* Header */
.header { margin-bottom: 30px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.5rem; color: var(--primary); }
.justify-center { justify-content: center; }
.text-center { text-align: center; }
.subtitle { opacity: 0.6; margin-top: 5px; font-size: 0.9rem; }

/* Cards */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid oklch(1 0 0 / 0.5);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: var(--shadow);
  margin-bottom: 25px;
}

.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-weight: 600; font-size: 0.85rem; margin-bottom: 8px; opacity: 0.8; }
.input-group input {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: 1.5px solid oklch(0.9 0.01 260);
  background: oklch(0.99 0.005 260);
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.2s;
}
.input-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px oklch(0.65 0.25 260 / 0.1);
}

/* Buttons */
.btn {
  width: 100%;
  padding: 16px;
  border-radius: 14px;
  border: none;
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 15px oklch(0.65 0.25 260 / 0.3);
}
.btn-primary:hover {
  background: oklch(0.6 0.25 260);
  box-shadow: 0 6px 20px oklch(0.65 0.25 260 / 0.4);
}

.btn-success {
  background: var(--success);
  color: white;
  box-shadow: 0 4px 15px oklch(0.65 0.25 150 / 0.3);
}

.btn-large { padding: 20px; font-size: 1.1rem; }

/* Task List */
.task-section h2 { font-size: 1.1rem; margin-bottom: 15px; font-weight: 700; opacity: 0.9; }
.task-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px;
  margin-bottom: 12px;
  background: var(--white);
  border-radius: 16px;
  border: 1px solid oklch(0.95 0.01 260);
  transition: all 0.2s;
}
.task-card:hover { transform: translateX(5px); border-color: var(--primary); }

.task-info h4 { font-size: 1rem; font-weight: 700; }
.task-info p { font-size: 0.8rem; opacity: 0.5; }

.badge {
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
}
.badge-pending { background: oklch(0.95 0.01 260); color: oklch(0.4 0.01 260); }
.badge-done { background: oklch(0.9 0.1 150); color: oklch(0.4 0.1 150); }

/* Performer Specific */
.performer-card { text-align: center; }
.status-badge {
  display: inline-block;
  padding: 6px 14px;
  background: oklch(0.65 0.25 260 / 0.1);
  color: var(--primary);
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 800;
  margin-bottom: 20px;
}
.task-instruction { font-size: 1.4rem; font-weight: 400; margin: 15px 0 30px; line-height: 1.4; }

.success-icon {
  font-size: 4rem;
  color: var(--success);
  margin-bottom: 20px;
  animation: bounce 1s infinite alternate;
}
@keyframes bounce {
  from { transform: scale(1); }
  to { transform: scale(1.1); }
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: oklch(0.2 0.02 260);
  color: white;
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 10px 30px oklch(0 0 0 / 0.2);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* Overlay & Spinner */
.overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  gap: 15px;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid oklch(0.9 0.01 260);
  border-top: 4px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Mobile optimization */
@media (max-width: 480px) {
  .app-container { padding: 15px; }
  .card { padding: 20px; }
}