/* Base Styles and Variables */
:root {
    --pink-light: #F6DFEB;
    --purple-light: #E4C1F9;
    --green-light: #D0F4DE;
    --yellow-light: #FCF6BD;
    --pink-medium: #FFB7C5;
    
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    
    --background-primary: #ffffff;
    --background-secondary: #f9f9f9;
    --background-tertiary: #f0f0f0;
    
    --border-radius: 12px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    
    /* Period colors */
    --period-color: var(--pink-medium);
    --fertile-color: var(--purple-light);
    --ovulation-color: var(--green-light);
    --today-color: var(--yellow-light);
    
    /* Font sizes */
    --font-size-small: 0.875rem;
    --font-size-medium: 1rem;
    --font-size-large: 1.25rem;
    --font-size-xlarge: 1.5rem;
    --font-size-xxlarge: 2rem;
}

/* Dark theme variables */
[data-theme="dark"] {
    --pink-light: #c4aebb;
    --purple-light: #b59ac7;
    --green-light: #a6c9b3;
    --yellow-light: #d2cc9e;
    --pink-medium: #d496a3;
    
    --text-primary: #f0f0f0;
    --text-secondary: #cccccc;
    --text-light: #333333;
    
    --background-primary: #222222;
    --background-secondary: #333333;
    --background-tertiary: #444444;
}

/* Typography */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--background-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: var(--font-size-xxlarge);
}

h2 {
    font-size: var(--font-size-xlarge);
}

h3 {
    font-size: var(--font-size-large);
}

p {
    margin-bottom: 1rem;
}

/* Layout */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--pink-light);
}

.app-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

section {
    background-color: var(--background-secondary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.app-footer {
    margin-top: 2rem;
    padding: 1rem 0;
    text-align: center;
    border-top: 2px solid var(--pink-light);
    font-size: var(--font-size-small);
    color: var(--text-secondary);
}

.app-footer a {
    color: var(--pink-medium);
    text-decoration: none;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* Form Elements */
.cycle-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="date"] {
    padding: 0.75rem;
    border: 2px solid var(--purple-light);
    border-radius: var(--border-radius);
    background-color: var(--background-primary);
    color: var(--text-primary);
    font-size: var(--font-size-medium);
    transition: var(--transition);
}

input[type="date"]:focus {
    outline: none;
    border-color: var(--pink-medium);
    box-shadow: 0 0 0 3px rgba(255, 183, 197, 0.3);
}

.range-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    flex: 1;
    height: 10px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--background-tertiary);
    border-radius: 5px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--pink-medium);
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--pink-medium);
    cursor: pointer;
    border: none;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-medium);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn {
    background-color: var(--pink-medium);
    color: var(--text-light);
}

.primary-btn:hover {
    background-color: #ff9eb2;
    transform: translateY(-2px);
}

.secondary-btn {
    background-color: var(--purple-light);
    color: var(--text-light);
}

.secondary-btn:hover {
    background-color: #d8acf5;
    transform: translateY(-2px);
}

.icon-btn {
    padding: 0.5rem 0.75rem;
    background-color: var(--background-tertiary);
    color: var(--text-primary);
}

.icon-btn:hover {
    background-color: var(--pink-light);
}

/* Cycle Info Section */
.cycle-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.info-card {
    background-color: var(--background-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.info-card:nth-child(1) {
    border-left: 5px solid var(--period-color);
}

.info-card:nth-child(2) {
    border-left: 5px solid var(--fertile-color);
}

.info-card:nth-child(3) {
    border-left: 5px solid var(--ovulation-color);
}

.countdown {
    font-size: var(--font-size-small);
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Calendar Styles */
.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.weekday {
    text-align: center;
    font-weight: 600;
    padding: 0.5rem;
    color: var(--text-secondary);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.calendar-day:hover {
    background-color: var(--background-tertiary);
}

.calendar-day.period {
    background-color: var(--period-color);
    color: var(--text-light);
}

.calendar-day.fertile {
    background-color: var(--fertile-color);
    color: var(--text-light);
}

.calendar-day.ovulation {
    background-color: var(--ovulation-color);
    color: var(--text-light);
}

.calendar-day.today {
    border: 2px solid var(--today-color);
    font-weight: bold;
}

.calendar-day.other-month {
    opacity: 0.4;
}

.calendar-day.has-notes::after {
    content: "•";
    position: absolute;
    bottom: 2px;
    font-size: 1.2rem;
    color: var(--pink-medium);
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-small);
}

.legend-color {
    width: 15px;
    height: 15px;
    border-radius: 50%;
}

.legend-color.period {
    background-color: var(--period-color);
}

.legend-color.fertile {
    background-color: var(--fertile-color);
}

.legend-color.ovulation {
    background-color: var(--ovulation-color);
}

.legend-color.today {
    border: 2px solid var(--today-color);
}

/* History Section */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    background-color: var(--background-primary);
    padding: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item-dates {
    display: flex;
    flex-direction: column;
}

.history-item-delete {
    background-color: transparent;
    border: none;
    color: var(--pink-medium);
    cursor: pointer;
    font-size: var(--font-size-large);
}

/* Stats Section */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stats-card {
    background-color: var(--background-primary);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
}

.chart-container {
    background-color: var(--background-primary);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
}

/* Notes Section */
.notes-date-selector {
    margin-bottom: 1.5rem;
}

.notes-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.symptoms-container, .mood-container, .notes-text-container {
    background-color: var(--background-primary);
    padding: 1rem;
    border-radius: var(--border-radius);
}

.symptom-options, .mood-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.symptom-btn, .mood-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--purple-light);
    border-radius: 20px;
    background-color: var(--background-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.symptom-btn.active, .mood-btn.active {
    background-color: var(--purple-light);
    color: var(--text-light);
}

textarea {
    width: 100%;
    height: 100px;
    padding: 0.75rem;
    border: 2px solid var(--purple-light);
    border-radius: var(--border-radius);
    background-color: var(--background-primary);
    color: var(--text-primary);
    resize: vertical;
    font-family: inherit;
    font-size: var(--font-size-medium);
}

textarea:focus {
    outline: none;
    border-color: var(--pink-medium);
}

.notes-saved-message {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--green-light);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    text-align: center;
}

/* Export Section */
.export-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.import-container {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--background-tertiary);
}

input[type="file"] {
    margin: 1rem 0;
}

/* Theme Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--background-tertiary);
    transition: var(--transition);
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: var(--background-primary);
    transition: var(--transition);
}

input:checked + .slider {
    background-color: var(--purple-light);
}

input:checked + .slider:before {
    transform: translateX(30px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.theme-icon {
    position: absolute;
    top: 6px;
    font-size: 14px;
    z-index: 1;
}

.theme-icon.light {
    right: 8px;
}

.theme-icon.dark {
    left: 8px;
}

/* Notification */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 1rem;
    background-color: var(--pink-medium);
    color: var(--text-light);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    z-index: 1000;
    transition: var(--transition);
    transform: translateY(0);
}

.notification.hidden {
    transform: translateY(200%);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .theme-toggle {
        align-self: flex-end;
    }
    
    .cycle-summary {
        grid-template-columns: 1fr;
    }
    
    .export-buttons {
        flex-direction: column;
    }
    
    .calendar-legend {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: var(--font-size-xlarge);
    }
    
    h2 {
        font-size: var(--font-size-large);
    }
    
    .calendar-grid {
        gap: 0.25rem;
    }
    
    .weekday {
        font-size: var(--font-size-small);
        padding: 0.25rem;
    }
    
    .calendar-day {
        font-size: var(--font-size-small);
    }
    
    .range-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    input[type="range"] {
        width: 100%;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 1s infinite;
}