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

:root {
    --primary-color: #ff6b9d;
    --primary-hover: #ff4f81;
    --secondary-color: #c44569;
    --secondary-hover: #a83256;
    --accent-color: #f8bbd9;
    --background-color: #fff8fa;
    --card-background: #ffffff;
    --text-primary: #2c2c2c;
    --text-secondary: #666666;
    --border-color: #f0d4e1;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(255, 107, 157, 0.15);
    --transition: all 0.3s ease;
    --first-trimester: #ffb3d1;
    --second-trimester: #d4a5ff;
    --third-trimester: #a5c8ff;
}

html, body {
    height: 100%;
    width: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    overflow-x: hidden;
}

.container {
    min-height: 100vh;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 20px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(255, 107, 157, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Calculator Section */
.calculator-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.calculator-form h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.method-selector {
    display: flex;
    gap: 20px;
    margin-bottom: 10px;
}

.method-selector label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    background: var(--background-color);
    transition: var(--transition);
}

.method-selector label:hover {
    background: var(--accent-color);
}

.method-selector input[type="radio"] {
    accent-color: var(--primary-color);
}

.method-selector span {
    font-weight: 600;
    color: var(--text-primary);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
}

input[type="date"] {
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background-color: var(--card-background);
    cursor: pointer;
    transition: var(--transition);
}

input[type="date"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-suffix {
    position: absolute;
    right: 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

input[type="number"] {
    width: 100%;
    padding: 12px 15px 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--card-background);
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-large {
    padding: 15px 24px;
    font-size: 1.1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 157, 0.3);
}

.btn-secondary {
    background-color: var(--card-background);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--accent-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.quick-presets {
    display: flex;
    flex-direction: column;
    gap: 15px;
    border-left: 2px solid var(--border-color);
    padding-left: 20px;
}

.quick-presets h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.preset-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.preset-btn {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--card-background);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.preset-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--accent-color);
}

/* Results Section */
.results-section {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.results-section h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.summary-card {
    background: var(--background-color);
    border-radius: var(--border-radius);
    padding: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    border: 2px solid var(--border-color);
}

.summary-card.featured {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.1) 0%, rgba(196, 69, 105, 0.1) 100%);
    border-color: var(--primary-color);
}

.card-icon {
    font-size: 2rem;
}

.card-content h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.card-content p {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.progress-bar-container {
    margin-bottom: 30px;
}

.progress-bar-container h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.progress-bar-wrapper {
    margin-bottom: 10px;
}

.progress-bar {
    height: 30px;
    background: var(--background-color);
    border-radius: 15px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    transition: width 0.5s ease;
    width: 0%;
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.progress-text {
    text-align: center;
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.detailed-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.result-table {
    background: var(--background-color);
    border-radius: var(--border-radius);
    padding: 20px;
}

.result-table h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.result-table table {
    width: 100%;
    border-collapse: collapse;
}

.result-table td {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.result-table td:first-child {
    font-weight: 600;
    color: var(--text-secondary);
    width: 60%;
}

.result-table td:last-child {
    text-align: right;
    font-weight: 600;
    color: var(--text-primary);
}

.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

/* Weekly Timeline */
.weekly-timeline {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.weekly-timeline h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.timeline {
    display: flex;
    overflow-x: auto;
    gap: 10px;
    padding-bottom: 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--background-color);
}

.timeline::-webkit-scrollbar {
    height: 8px;
}

.timeline::-webkit-scrollbar-track {
    background: var(--background-color);
    border-radius: 4px;
}

.timeline::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.week-card {
    flex: 0 0 120px;
    background: var(--background-color);
    border-radius: var(--border-radius);
    padding: 15px 10px;
    border: 2px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.week-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.week-card.current {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.2) 0%, rgba(196, 69, 105, 0.2) 100%);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.week-card .week-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.week-card .week-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Trimesters Section */
.trimesters-section {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.trimesters-section h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.trimester-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.trimester-card {
    background: var(--background-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.trimester-header {
    padding: 15px;
    text-align: center;
    font-weight: 700;
    color: white;
}

.trimester-header.first {
    background: var(--first-trimester);
}

.trimester-header.second {
    background: var(--second-trimester);
}

.trimester-header.third {
    background: var(--third-trimester);
}

.trimester-content {
    padding: 20px;
}

.trimester-content h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.trimester-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.trimester-milestones {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.trimester-milestones span {
    font-size: 0.85rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.trimester-milestones span::before {
    content: "✓";
    color: var(--primary-color);
    font-weight: bold;
}

/* Tips Section */
.tips-section {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 25px 30px;
    box-shadow: var(--shadow);
}

.tips-section h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.tips-section ul {
    list-style-type: none;
    padding-left: 0;
}

.tips-section li {
    padding: 8px 0;
    padding-left: 30px;
    position: relative;
    color: var(--text-secondary);
}

.tips-section li::before {
    content: "♥";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Disclaimer */
.disclaimer {
    background: #fff8f8;
    border: 1px solid #ffcccc;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 10px;
}

.disclaimer p {
    color: var(--secondary-color);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.calculator-section,
.results-section,
.weekly-timeline,
.trimesters-section,
.tips-section,
.disclaimer {
    animation: fadeIn 0.5s ease-out;
}

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

.summary-card.featured {
    animation: pulse 2s infinite;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .calculator-section {
        grid-template-columns: 1fr;
    }

    .quick-presets {
        border-left: none;
        border-top: 2px solid var(--border-color);
        padding-left: 0;
        padding-top: 20px;
    }

    .preset-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .trimester-cards {
        grid-template-columns: 1fr;
    }

    .detailed-results {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .method-selector {
        flex-direction: column;
        gap: 10px;
    }

    .preset-buttons {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        justify-content: stretch;
    }

    .action-buttons .btn {
        flex: 1;
    }

    .summary-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .week-card {
        flex: 0 0 100px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .summary-cards {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .btn-large {
        padding: 12px 20px;
        font-size: 1rem;
    }

    .result-table table {
        font-size: 0.9rem;
    }

    .result-table td {
        padding: 6px 8px;
    }

    .week-card {
        flex: 0 0 80px;
    }

    .week-card .week-number {
        font-size: 1rem;
    }
}