:root {
    --primary: #4338ca; /* Indigo 700 */
    --primary-light: #6366f1; /* Indigo 500 */
    --primary-dark: #312e81; /* Indigo 900 */
    --secondary: #14b8a6; /* Teal 500 */
    --bg-color: #f8fafc; /* Slate 50 */
    --surface-color: #ffffff;
    --text-main: #1e293b; /* Slate 800 */
    --text-muted: #64748b; /* Slate 500 */
    --border-color: #e2e8f0; /* Slate 200 */
    --danger: #ef4444; /* Red 500 */
    --success: #22c55e; /* Green 500 */
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
}

h1 {
    font-size: 2.25rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
    text-align: center;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: block;
  text-align: center;
  margin-bottom: 1rem;
}

/* Layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.card {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

input[type="text"],
input[type="date"],
input[type="time"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    font-size: 1rem;
    transition: all 0.2s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background-color: var(--surface-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
    font-size: 1rem;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(67, 56, 202, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--bg-color);
    border-color: var(--text-muted);
}

.btn-danger {
    background-color: white;
    border: 1px solid var(--danger);
    color: var(--danger);
}

.btn-danger:hover {
    background-color: #fef2f2;
}

.btn-icon {
    padding: 0.5rem;
    border-radius: 50%;
}

/* Slot Builder */
.poll-slots {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.slot-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    background: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius-md);
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.slot-row input {
    margin-bottom: 0;
}

.add-slot-btn {
    width: 100%;
    margin-top: 1rem;
    border-style: dashed;
}

/* Poll View */
.poll-header {
    text-align: center;
    margin-bottom: 2rem;
}

.poll-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.poll-table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.poll-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.poll-table th, .poll-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.poll-table th {
    background-color: var(--bg-color);
    font-weight: 600;
    color: var(--text-main);
    position: sticky;
    top: 0;
}

.poll-table .participant-col {
    text-align: left;
    font-weight: 600;
    background-color: var(--surface-color);
    position: sticky;
    left: 0;
    z-index: 10;
    border-right: 1px solid var(--border-color);
}

.vote-cell {
    cursor: pointer;
    transition: background-color 0.2s;
}

.vote-cell:hover {
    background-color: var(--bg-color);
}

/* Toggle Checkbox style for voting */
.vote-checkbox {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: 2px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    transition: all 0.2s;
}

.vote-checkbox.checked {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
}

.vote-checkbox.maybe {
    background-color: #f59e0b; /* Amber */
    border-color: #f59e0b;
    color: white;
}

/* Best Slot Highlight */
.best-slot {
    background-color: #ecfdf5; /* Green 50 */
    border: 2px solid var(--success);
}

.result-count {
    font-weight: bold;
    color: var(--success);
}

/* History List */
.history-list {
    list-style: none;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.history-item:last-child {
    border-bottom: none;
}

.history-item:hover {
    background-color: var(--bg-color);
}

.history-item-info strong {
    display: block;
    color: var(--primary);
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-open {
    background-color: #d1fae5;
    color: #065f46;
}

.status-closed {
    background-color: #f1f5f9;
    color: #475569;
}

/* Responsive utilities */
@media (max-width: 640px) {
    .slot-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}