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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --border-color: #d0d7de;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --blue: #0969da;
    --green: #1a7f37;
    --red: #cf222e;
    --orange: #bc4c00;
    --shadow: rgba(31, 35, 40, 0.12);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding: 30px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px var(--shadow);
}

.header-content {
    text-align: center;
    flex: 1;
}

h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--blue);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.status {
    padding: 8px 16px;
    background: var(--green);
    color: white;
    border-radius: 6px;
    font-weight: 600;
    display: inline-block;
    margin-top: 15px;
    font-size: 0.9rem;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px var(--shadow);
}

h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

/* Slot Grid */
.slot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 10px;
    margin-top: 20px;
}

.slot-btn {
    padding: 20px 10px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all 0.2s ease;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.slot-btn:hover {
    background: var(--blue);
    color: white;
    border-color: var(--blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

.slot-btn:active {
    transform: translateY(0);
}

/* Schedule Form */
.schedule-form {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr auto;
    gap: 10px;
    margin-bottom: 20px;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
}

label {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

select, input[type="time"], input[type="datetime-local"] {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background: white;
    color: var(--text-primary);
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

button.primary {
    background: var(--green);
    color: white;
}

button.primary:hover {
    background: #116329;
}

button.danger {
    background: var(--red);
    color: white;
    padding: 6px 12px;
    font-size: 0.85rem;
}

button.danger:hover {
    background: #a40e26;
}

/* Refresh Button */
.refresh-btn {
    padding: 10px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--text-secondary);
    position: absolute;
    right: 20px;
}

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

.refresh-btn:active {
    transform: rotate(180deg);
}

.refresh-btn.spinning {
    animation: spin 0.6s ease-in-out;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Schedule List */
.schedule-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.schedule-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.schedule-info {
    display: flex;
    gap: 20px;
    align-items: center;
}

.schedule-slot {
    font-weight: 700;
    color: var(--blue);
    font-size: 1.1rem;
}

.schedule-time {
    color: var(--text-secondary);
    font-weight: 600;
}

/* Logs */
.log-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 400px;
    overflow-y: auto;
}

.log-item {
    display: grid;
    grid-template-columns: 100px 80px 1fr;
    gap: 15px;
    padding: 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.log-time {
    color: var(--text-secondary);
    font-weight: 500;
}

.log-slot {
    font-weight: 700;
    color: var(--blue);
}

.log-status {
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.8rem;
    display: inline-block;
}

.log-status.success {
    background: #dafbe1;
    color: var(--green);
}

.log-status.failed {
    background: #ffebe9;
    color: var(--red);
}

.log-status.manual {
    background: #ddf4ff;
    color: var(--blue);
}

/* Empty states */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-style: italic;
}

/* Loading */
.loading {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 6px;
    font-weight: 600;
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

.notification.success {
    background: var(--green);
    color: white;
}

.notification.error {
    background: var(--red);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Mobile responsive */
@media (max-width: 768px) {
    .schedule-form {
        grid-template-columns: 1fr;
    }
    
    .slot-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    }
    
    .log-item {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    header {
        flex-direction: column;
        position: relative;
    }
    
    .refresh-btn {
        position: absolute;
        top: 20px;
        right: 20px;
    }
}

footer {
    text-align: center;
    color: var(--text-secondary);
    margin-top: 40px;
    font-size: 0.9rem;
    padding: 20px;
}