/* assets/css/style.css */

/* --- Variable Definitions --- */
:root {
    --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    /* Default to Light Theme */
    --background-primary: #f4f7fa;
    --background-secondary: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    --primary-color: #4a69bd;
    --primary-color-hover: #3c569a;
    --accent-color: #6a89cc;
    --danger-color: #e53e3e;
    --success-color: #38a169;
}

/* --- Dark Theme Overrides --- */
html[data-theme='dark'] {
    --background-primary: #1a202c;
    --background-secondary: #2d3748;
    --text-primary: #edf2f7;
    --text-secondary: #a0aec0;
    --border-color: #4a5568;
    --primary-color: #63b3ed;
    --primary-color-hover: #4299e1;
    --accent-color: #4299e1;
    --danger-color: #fc8181;
    --success-color: #68d391;
}

/* --- Global Styles & Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family-sans);
    background-color: var(--background-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.page-container {
    display: flex;
    height: 100vh; /* Lock the container to the full screen height */
    overflow: hidden; /* Prevent the container itself from scrolling */
}

.sidebar {
    width: 240px;
    background-color: var(--background-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, border-color 0.3s;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    height: 40px;
    width: auto;
    display: block;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    margin-left: auto;
    padding: 4px;
}

.sidebar-nav {
    flex-grow: 1;
    padding: 16px 0;
}

.sidebar-nav a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 12px 24px;
    margin: 4px 0;
    font-weight: 500;
    transition: background-color 0.2s, color 0.2s;
}

.sidebar-nav a:hover {
    background-color: rgba(0,0,0,0.05);
}
html[data-theme='dark'] .sidebar-nav a:hover {
    background-color: rgba(255,255,255,0.05);
}


.sidebar-nav a.active {
    color: var(--primary-color);
    font-weight: 600;
    border-right: 3px solid var(--primary-color);
}

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}
.sidebar-footer a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 8px;
}

.main-content {
    flex-grow: 1;
    padding: 24px 32px;
    overflow-y: auto;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.main-header h1 {
    font-size: 28px;
    font-weight: 700;
}

/* --- Components --- */
.card {
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    transition: background-color 0.3s, border-color 0.3s;
}

.card h3 {
    margin-bottom: 16px;
    font-size: 18px;
    font-weight: 600;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.grid-container-fluid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.full-width {
    grid-column: 1 / -1;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--background-primary);
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
}

.form-row {
    display: flex;
    gap: 16px;
}
.form-row .form-group {
    flex: 1;
}


.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

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

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

/* Authentication Pages */
.auth-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 32px;
    background-color: var(--background-secondary);
    border-radius: 12px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 8px;
}

.auth-container p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.auth-container .btn {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
}

.auth-switch {
    margin-top: 16px !important;
    font-size: 14px;
}
.auth-switch a {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
}

/* Alerts */
.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-danger {
    background-color: var(--danger-color);
    color: white;
}
.alert-success {
    background-color: var(--success-color);
    color: white;
}

/* Tables */
#nutrition-log-table table {
    width: 100%;
    border-collapse: collapse;
}

#nutrition-log-table th, #nutrition-log-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

#nutrition-log-table th {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
}

/* Chart Container */
.chart-container {
    height: 300px;
}

/* Form Dividers */
.form-divider {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin: 20px 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* --- Coach/Chat Page --- */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px); /* Full height minus header/padding */
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.chat-box {
    flex-grow: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-message {
    display: flex;
    max-width: 75%;
}

.chat-message.user {
    align-self: flex-end;
}

.chat-message.ai {
    align-self: flex-start;
}

.message-content {
    padding: 12px 16px;
    border-radius: 18px;
    line-height: 1.5;
}

.chat-message.user .message-content {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.chat-message.ai .message-content {
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.chat-input-area {
    border-top: 1px solid var(--border-color);
    padding: 16px;
}

.chat-form {
    display: flex;
    gap: 12px;
}

.chat-form input {
    flex-grow: 1;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--background-primary);
    color: var(--text-primary);
}

.message-content.typing {
    font-style: italic;
    color: var(--text-secondary);
}

.form-section-title {
    font-size: 16px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
}

.profile-age-display {
    padding: 12px;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
}

/* --- Dashboard Specific Styles --- */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}
.date-display {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 4px;
}
.welcome-message {
    font-size: 28px;
    font-weight: 700;
    margin: 0;
}
.quick-actions {
    display: flex;
    gap: 12px;
}
.btn-secondary {
    background-color: var(--background-secondary);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}
.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
}
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: min-content;
    gap: 24px;
}
.summary-card {
    text-align: center;
    padding: 20px;
}
.summary-card h4 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.summary-card p {
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
    color: var(--text-primary);
}
.summary-card span {
    font-size: 14px;
    color: var(--text-secondary);
}

.calories-consumed p { color: #68d391; }
.calories-burned p { color: #fc8181; }
.water-intake p { color: #63b3ed; }

.large-card {
    grid-column: span 2;
}
.medium-card {
    grid-column: span 2;
}

@media (max-width: 1200px) {
    .large-card, .medium-card {
        grid-column: span 4;
    }

}
.card-subtitle {
    color: var(--text-secondary);
    margin-top: -12px;
    margin-bottom: 16px;
    font-size: 14px;
}
.recent-activity-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.recent-activity-list li {
    display: flex;
    align-items: center;
    gap: 16px;
}
.activity-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background-color: var(--background-primary);
}
.activity-details {
    flex-grow: 1;
}
.activity-name {
    font-weight: 500;
    display: block;
}
.activity-value {
    font-size: 14px;
    color: var(--text-secondary);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.date-selector-container {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--background-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.date-selector-container label {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-secondary);
}

#date-picker {
    background-color: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 16px;
}

/* --- Data Table Styles --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table thead th {
    font-weight: 600;
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tbody td {
    color: var(--text-primary);
}

.data-table tbody td strong {
    font-weight: 600;
    color: var(--primary-color);
}

.data-table tbody tr:nth-child(even) {
    background-color: var(--background-primary);
}

.data-table tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.03);
}
html[data-theme='dark'] .data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

.data-table td.actions {
    display: flex;
    gap: 8px;
}
.actions button {
    border: none;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    color: white;
}
.btn-edit {
    background-color: var(--primary-color);
}
.btn-delete {
    background-color: var(--danger-color);
}
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

/* --- Goals Page Styles --- */
.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.goal-card {
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}
.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.goal-header h5 {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
}
.goal-header .btn-delete {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
}
.goal-progress-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}
.progress-bar {
    width: 100%;
    height: 12px;
    background-color: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 12px;
}
.progress-bar-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 6px;
    transition: width 0.5s ease-in-out;
}
.goal-dates {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: auto;
}


/* --- Check-in Page Styles --- */
.checkin-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.checkin-list label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    cursor: pointer;
}
.checkin-list input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

/* --- Reports Page Styles --- */
.report-range-buttons {
    display: flex;
    gap: 8px;
}
.btn-range {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}
.btn-range.active, .btn-range:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}
.card.summary-card p {
    font-size: 32px;
}
.checkin-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.btn-delete-habit {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    border-radius: 50%;
    width: 30px;
    height: 30px;
}
.btn-delete-habit:hover {
    color: var(--danger-color);
    background-color: var(--border-color);
}

.goal-header {
    align-items: flex-start;
}
.goal-actions {
    display: flex;
    gap: 8px;
}
.btn-complete {
    background-color: transparent;
    border: 1px solid var(--success-color);
    color: var(--success-color);
    font-weight: bold;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    cursor: pointer;
    line-height: 1;
    transition: all 0.2s ease;
}
.btn-complete:hover {
    background-color: var(--success-color);
    color: white;
}
.goal-card.completed {
    opacity: 0.65;
    background-color: var(--background-primary);
}
.completed-badge {
    font-size: 14px;
    font-weight: 600;
    color: var(--success-color);
    padding: 4px 8px;
    border-radius: 6px;
    background-color: rgba(56, 161, 105, 0.1);
}

/* --- Chat Formatting Styles --- */
.message-content ul {
    list-style-position: inside;
    padding-left: 10px;
    margin-top: 8px;
}

.message-content li {
    margin-bottom: 4px;
}

.message-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

/* --- Responsive Design --- */

/* Tablet (max-width: 900px) */
@media (max-width: 900px) {
    .page-container {
        flex-direction: column;
        height: auto;
    }
    .sidebar {
        width: 100%;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        min-width: 0;
        padding: 0;
    }
    .sidebar-header {
        padding: 12px;
        border-bottom: none;
    }
    .sidebar-nav {
        flex-direction: row;
        display: flex;
        flex-wrap: wrap;
        padding: 0 8px;
        gap: 0;
    }
    .sidebar-nav a {
        padding: 10px 12px;
        margin: 0 2px;
        border-right: none;
        border-bottom: 3px solid transparent;
    }
    .sidebar-nav a.active {
        border-bottom: 3px solid var(--primary-color);
        border-right: none;
    }
    .sidebar-footer {
        display: none;
    }
    .main-content {
        padding: 16px 8px;
    }
    .dashboard-grid, .summary-grid, .grid-container-fluid {
        grid-template-columns: 1fr 1fr !important;
    }
    .large-card, .medium-card {
        grid-column: span 2 !important;
    }
}

/* Mobile (max-width: 600px) */
@media (max-width: 600px) {
    .sidebar {
        flex-direction: column;
        width: 100%;
        min-width: 0;
        border-bottom: 1px solid var(--border-color);
        border-right: none;
    }
    .sidebar-header {
        padding: 8px;
    }
    .sidebar-nav {
        flex-direction: column;
        align-items: stretch;
        padding: 0;
    }
    .sidebar-nav a {
        padding: 10px 8px;
        font-size: 15px;
        border-bottom: 1px solid var(--border-color);
        border-right: none;
        margin: 0;
    }
    .sidebar-nav a.active {
        border-bottom: 3px solid var(--primary-color);
        border-right: none;
    }
    .main-content {
        padding: 10px 4px;
    }
    .main-header h1, .welcome-message {
        font-size: 20px;
    }
    .dashboard-header, .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .dashboard-grid, .summary-grid, .grid-container, .grid-container-fluid, .goals-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
    .card, .card.full-width, .card.large-card, .card.medium-card {
        padding: 12px !important;
    }
    .form-row {
        flex-direction: column;
        gap: 8px;
    }
    .form-group label {
        font-size: 13px;
    }
    .btn, .btn-primary, .btn-secondary {
        width: 100%;
        padding: 10px 0;
        font-size: 15px;
    }
    .chart-container {
        height: 200px !important;
        min-width: 0;
        overflow-x: auto;
    }
    .data-table, #nutrition-log-table table {
        font-size: 12px;
        min-width: 400px;
        display: block;
        overflow-x: auto;
        width: 100%;
    }
    .data-table th, .data-table td, #nutrition-log-table th, #nutrition-log-table td {
        padding: 8px 6px;
    }
    .recent-activity-list li, .checkin-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .activity-icon {
        width: 32px;
        height: 32px;
        font-size: 18px;
    }
    .goal-card {
        padding: 10px;
    }
    .auth-container {
        padding: 16px;
        max-width: 98vw;
    }
}

/* Menu Icon and Responsive Sidebar Nav */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    margin-left: auto;
    padding: 4px;
}
@media (max-width: 900px) {
    .menu-toggle {
        display: block;
    }
}
@media (max-width: 600px) {
    .menu-toggle {
        display: block;
    }
}

/* Hide sidebar nav by default on mobile, show when active */
@media (max-width: 900px) {
    .sidebar-nav {
        display: none;
    }
    .sidebar.show-nav .sidebar-nav {
        display: flex;
    }
}
@media (max-width: 600px) {
    .sidebar-nav {
        display: none;
    }
    .sidebar.show-nav .sidebar-nav {
        display: flex;
    }
}