:root {
    --bg-primary: #f5f5f7;
    --bg-card: rgba(255, 255, 255, 0.8);
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow: rgba(0, 0, 0, 0.1);
    --accent: #007aff;
    --accent-hover: #0051d5;
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-card: rgba(28, 28, 30, 0.8);
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: rgba(0, 0, 0, 0.5);
    --accent: #0a84ff;
    --accent-hover: #409cff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
    transition: background 0.3s ease;
}

.container {
    max-width: 430px;
    margin: 0 auto;
}

.header {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 28px;
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left h1 {
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.month-year {
    color: var(--text-secondary);
    font-size: 16px;
    margin-top: 4px;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 22px;
    background: var(--border-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--accent);
    transform: scale(1.05);
}

.calendar-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 28px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px var(--shadow);
}

.weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-bottom: 10px;
}

.weekday {
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 0;
}

.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    background: var(--border-color);
    padding: 6px 2px 4px 2px;
}

.day:hover {
    background: var(--accent);
    color: white;
    transform: scale(1.05);
}

.day:hover .task-dots {
    opacity: 0.8;
}

.day.selected {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
    transform: scale(1.08);
}

.day.empty {
    opacity: 0.3;
    cursor: default;
}

.day.empty:hover {
    background: var(--border-color);
    color: var(--text-primary);
    transform: none;
}

.task-dots {
    display: flex;
    gap: 2px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    margin-top: 2px;
    max-width: 100%;
}

.task-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    flex-shrink: 0;
}

.tasks-view {
    display: none;
}

.tasks-view.active {
    display: block;
}

.tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.back-btn {
    background: var(--border-color);
    border: none;
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.back-btn:hover {
    background: var(--accent);
    color: white;
}

.selected-date {
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 600;
}

.add-task-btn {
    background: var(--accent);
    border: none;
    color: white;
    padding: 12px 24px;
    border-radius: 24px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 4px 16px var(--shadow);
    transition: all 0.3s;
    width: 100%;
    margin-bottom: 20px;
}

.add-task-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

.timeline {
    position: relative;
}

.task-block {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 16px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.task-block::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    border-radius: 0 2px 2px 0;
    background: var(--task-color, #007aff);
}

.task-block:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 16px var(--shadow);
}

.task-block.completed {
    opacity: 0.6;
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.task-title {
    color: var(--text-primary);
    font-size: 17px;
    font-weight: 600;
    flex: 1;
}

.task-time {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

.checkbox {
    width: 24px;
    height: 24px;
    border-radius: 12px;
    border: 2px solid var(--text-secondary);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s;
    flex-shrink: 0;
    margin-left: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkbox:hover {
    border-color: var(--accent);
    transform: scale(1.1);
}

.checkbox.checked {
    background: var(--accent);
    border-color: var(--accent);
}

.checkbox.checked::after {
    content: '✓';
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border-radius: 28px;
    padding: 28px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 20px 60px var(--shadow);
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal h2 {
    color: var(--text-primary);
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

input,
select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: 20px;
    font-size: 15px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s;
    font-family: inherit;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.time-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.color-picker {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    margin-top: 8px;
}

.color-option {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 16px;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all 0.3s;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--accent);
    box-shadow: 0 4px 12px var(--shadow);
}

.modal-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 24px;
}

.modal-buttons.has-delete {
    grid-template-columns: 1fr 1fr 1fr;
}

.btn {
    padding: 12px;
    border: none;
    border-radius: 22px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-cancel {
    background: var(--border-color);
    color: var(--text-primary);
}

.btn-cancel:hover {
    background: var(--text-secondary);
    color: white;
}

.btn-delete {
    background: #ff3b30;
    color: white;
}

.btn-delete:hover {
    background: #d32f2f;
}

.btn-save {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 16px var(--shadow);
}

.btn-save:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.days-selector {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.day-btn {
    aspect-ratio: 1;
    border: 1.5px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    padding: 0;
}

.day-btn:hover {
    border-color: var(--accent);
}

.day-btn.selected {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.repeat-badge {
    display: inline-block;
    background: var(--border-color);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 8px;
    margin-top: 4px;
}

/* ── General Tasks Section ── */
.general-tasks-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 28px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px var(--shadow);
}

.general-tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.general-tasks-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.general-tasks-icon {
    font-size: 18px;
}

.general-tasks-title h2 {
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 700;
    margin: 0;
}

.add-general-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: white;
    font-size: 20px;
    font-weight: 400;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    line-height: 1;
    flex-shrink: 0;
}

.add-general-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.1);
}

.general-task-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 18px;
    background: var(--border-color);
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.general-task-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    border-radius: 0 2px 2px 0;
    background: var(--item-color, #007aff);
}

.general-task-item:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 16px var(--shadow);
}

.general-task-item.completed .general-task-name {
    text-decoration: line-through;
    opacity: 0.5;
}

.general-task-name {
    flex: 1;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    padding-left: 6px;
}

.empty-state-small {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}