:root {
    --primary-color: #008080;
    --secondary-color: #20B2AA;
    --accent-color: #40E0D0;
    --light-accent: #48D1CC;
    --lightest-accent: #7FFFD4;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --gray: #6C757D;
    --dark-gray: #343A40;
    --success: #28A745;
    --warning: #FFC107;
    --danger: #DC3545;
    --shadow: rgba(0, 128, 128, 0.1);
    --shadow-heavy: rgba(0, 128, 128, 0.2);
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--lightest-accent) 0%, var(--white) 100%);
    color: var(--dark-gray);
    line-height: 1.6;
    padding-bottom: 80px;
    min-height: 100vh;
}

.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.header-stats {
    display: flex;
    justify-content: center;
    gap: 1rem;
    font-size: 0.9rem;
}

.app-main {
    padding: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.section.active {
    display: block;
}

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

.daily-checkin {
    background: var(--white);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow);
    margin-bottom: 2rem;
}

.daily-checkin h2 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.4rem;
}

.daily-checkin p {
    color: var(--gray);
    margin-bottom: 1.5rem;
}

.victory-options {
    margin-bottom: 1.5rem;
}

.victory-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--light-gray);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.victory-item:hover {
    background: var(--lightest-accent);
    transform: translateX(5px);
}

.victory-item input[type="checkbox"] {
    display: none;
}

.victory-item input[type="checkbox"]:checked + .checkmark {
    transform: scale(1.2);
    filter: brightness(1.2);
}

.victory-item input[type="checkbox"]:checked ~ .victory-text {
    font-weight: 600;
    color: var(--primary-color);
}

.victory-item.checked {
    background: var(--accent-color);
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.checkmark {
    font-size: 1.5rem;
    margin-right: 1rem;
    transition: transform 0.3s ease;
}

.victory-text {
    flex: 1;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.custom-victory {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.custom-victory input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--light-accent);
    border-radius: 10px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.custom-victory input:focus {
    border-color: var(--primary-color);
}

.custom-victory button {
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.custom-victory button:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-heavy);
}

.submit-btn:disabled {
    background: var(--gray);
    cursor: not-allowed;
    opacity: 0.6;
}

.daily-summary {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--light-accent) 100%);
    border-radius: 15px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    text-align: center;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.daily-summary h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.points-display {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.victories-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.victory-badge {
    background: var(--white);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 2px 5px var(--shadow);
}

.progress-container {
    background: var(--white);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow);
}

.progress-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--light-accent) 0%, var(--lightest-accent) 100%);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
}

.progress-chart {
    margin-bottom: 2rem;
}

.progress-chart h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.chart-container {
    background: var(--light-gray);
    border-radius: 10px;
    padding: 1rem;
    min-height: 200px;
    display: flex;
    align-items: end;
    justify-content: space-around;
    gap: 0.5rem;
}

.chart-bar {
    background: linear-gradient(to top, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 5px 5px 0 0;
    min-width: 30px;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chart-bar:hover {
    filter: brightness(1.2);
    transform: scale(1.05);
}

.chart-bar-value {
    position: absolute;
    top: -25px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
}

.chart-bar-label {
    margin-top: 0.5rem;
    font-size: 0.7rem;
    color: var(--gray);
}

.milestones h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.milestones-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.milestone-item {
    background: var(--light-gray);
    padding: 1rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.milestone-item.achieved {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--light-accent) 100%);
    color: var(--primary-color);
    font-weight: 600;
}

.milestone-icon {
    font-size: 1.5rem;
}

.motivation-container {
    background: var(--white);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow);
}

.motivation-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.daily-quote {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--light-accent) 100%);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.quote-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.quote-text {
    font-size: 1.2rem;
    font-style: italic;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.quote-btn {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.custom-reminders h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.reminder-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.reminder-form input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--light-accent);
    border-radius: 10px;
    font-size: 1rem;
    outline: none;
}

.reminder-form input:focus {
    border-color: var(--primary-color);
}

.reminder-form button {
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.reminder-form button:hover {
    background: var(--primary-color);
}

.reminders-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.reminder-item {
    background: var(--light-gray);
    padding: 1rem;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.reminder-text {
    flex: 1;
}

.reminder-delete {
    background: var(--danger);
    color: var(--white);
    border: none;
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.achievements h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.achievement-item {
    background: var(--light-gray);
    border-radius: 15px;
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
}

.achievement-item.unlocked {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--light-accent) 100%);
    transform: scale(1.05);
}

.achievement-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.achievement-name {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.achievement-desc {
    font-size: 0.8rem;
    color: var(--gray);
}

.settings-container {
    background: var(--white);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow);
}

.settings-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.settings-group {
    margin-bottom: 2rem;
}

.settings-group h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--light-gray);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    cursor: pointer;
}

.setting-item input[type="checkbox"] {
    display: none;
}

.setting-item input[type="number"] {
    width: 80px;
    padding: 0.5rem;
    border: 2px solid var(--light-accent);
    border-radius: 5px;
    text-align: center;
}

.toggle {
    width: 50px;
    height: 25px;
    background: var(--gray);
    border-radius: 25px;
    position: relative;
    transition: background 0.3s ease;
}

.toggle::after {
    content: '';
    width: 21px;
    height: 21px;
    background: var(--white);
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform 0.3s ease;
}

.setting-item input[type="checkbox"]:checked + .toggle {
    background: var(--primary-color);
}

.setting-item input[type="checkbox"]:checked + .toggle::after {
    transform: translateX(25px);
}

.settings-btn {
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

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

.settings-btn.danger {
    background: var(--danger);
}

.settings-btn.danger:hover {
    background: #c82333;
}

.faq-container {
    background: var(--white);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow);
}

.faq-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.faq-item {
    border-bottom: 1px solid var(--light-gray);
    margin-bottom: 1rem;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1rem 0;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.3s ease;
}

.faq-question:hover {
    color: var(--secondary-color);
}

.faq-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding-bottom: 1rem;
    color: var(--gray);
    line-height: 1.6;
    animation: slideDown 0.3s ease-out;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; }
    to { opacity: 1; max-height: 200px; }
}

.celebration-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.celebration-content {
    background: var(--white);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    max-width: 90%;
    animation: bounceIn 0.5s ease-out;
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

.celebration-animation {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.celebration-content h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.celebration-content p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.celebration-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    border-radius: 25px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 -2px 10px var(--shadow);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--gray);
    transition: all 0.3s ease;
    padding: 0.5rem;
    border-radius: 10px;
    min-width: 60px;
}

.nav-item:hover {
    color: var(--primary-color);
    background: var(--lightest-accent);
}

.nav-item.active {
    color: var(--primary-color);
    background: var(--lightest-accent);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.8rem;
    font-weight: 500;
}

footer {
    background: var(--dark-gray);
    color: var(--white);
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    margin-top: 2rem;
}

@media (min-width: 768px) {
    .app-main {
        padding: 2rem;
        max-width: 800px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .achievements-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .bottom-nav {
        max-width: 800px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: 15px 15px 0 0;
    }
}

@media (min-width: 1024px) {
    .app-main {
        max-width: 1000px;
        padding: 2rem 3rem;
    }
    
    .daily-checkin, .progress-container, .motivation-container, .settings-container, .faq-container {
        padding: 2rem;
    }
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.glow {
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 10px var(--accent-color); }
    to { box-shadow: 0 0 20px var(--accent-color), 0 0 30px var(--accent-color); }
}