:root {
    --primary-color: #ff6600; /* Man default */
    --secondary-color: #333333;
    --background-color: #f4f4f8; /* Lighter, slightly blueish grey */
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-light: #666;
    --border-color: #e8e8ea;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --nav-height: 65px;
    --header-height: 55px;
    --border-radius: 12px; /* More rounded corners */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 10px rgba(0,0,0,0.08);

    /* Woman Theme */
    --woman-primary: #ff7eb9; /* Brighter Pink */
    --woman-secondary: #fca3cc;
    --woman-bg: #fff0f6;
    --woman-text: #5c3c4c;
    --woman-accent: #a0e7e5; /* Light Teal/Blue */

    /* Man Theme */
    --man-primary: #ff6600;
    --man-secondary: #cc5200;
    --man-bg: #f4f4f8;
    --man-text: #333333;
    --man-accent: #ffc107;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease;
}

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    padding-bottom: calc(var(--nav-height) + 20px);
}
.main-content::-webkit-scrollbar {
    display: none;
}
.main-content {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 0 15px;
    text-align: center;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease;
    position: sticky;
    top: 0;
    z-index: 999;
}

header h1 {
    font-size: 1.25rem; /* Slightly smaller */
    font-weight: 600;
    margin: 0;
}

h2 {
    font-size: 1.2rem;
    margin: 20px 0 15px 0;
    color: var(--primary-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

h3 {
    font-size: 1rem;
    margin: 15px 0 8px 0;
    color: var(--secondary-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

/* Selection Controls - Toggle + Tabs */
.selection-controls {
    display: flex; /* Changed to flex */
    gap: 15px; /* Increased gap */
    margin-bottom: 20px;
    align-items: center; /* Align items vertically */
}

/* User Toggle Switch */
.user-toggle-container {
    display: flex;
    align-items: center;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 5px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}
.user-toggle-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
    margin: 0 8px;
    cursor: pointer;
}
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px; /* Width of the switch */
    height: 26px; /* Height of the switch */
}
.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--man-primary); /* Man color default */
    transition: .3s;
    border-radius: 26px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 20px; /* Size of the circle */
    width: 20px;
    left: 3px; /* Position from left */
    bottom: 3px; /* Position from bottom */
    background-color: white;
    transition: .3s;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
input:checked + .slider {
    background-color: var(--woman-primary); /* Woman color when checked */
}
input:checked + .slider:before {
    transform: translateX(24px); /* Move circle to the right */
}

/* Workout Tabs */
.tabs {
    flex: 1; /* Take remaining space */
    display: flex;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
}

.tab {
    flex: 1;
    padding: 10px 5px; /* Adjusted padding */
    text-align: center;
    background-color: transparent;
    color: var(--text-light);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    font-weight: 500;
    font-size: 0.85rem;
    border: none;
    outline: none;
}
.tab:not(:last-child) {
    border-right: 1px solid var(--border-color);
}

.tab.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

/* Page Sections */
.page-section { display: none; }
.page-section.active { display: block; }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Exercise Card - Modernized */
.exercise-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: transform 0.15s ease-out, box-shadow 0.15s ease-out;
}
.exercise-card:active {
     transform: scale(0.98);
     box-shadow: none;
}

.exercise-name {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s ease;
}
.exercise-name .cinnamoroll-svg {
    width: 24px;
    height: 24px;
    opacity: 0.8;
}

.exercise-details {
    margin-bottom: 10px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.exercise-instructions {
    margin-bottom: 15px;
    font-size: 0.85rem;
    color: var(--text-color);
    line-height: 1.4;
}

/* Input Fields - Modernized */
.input-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.input-field {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    background-color: var(--background-color); /* Match body bg */
    transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none; /* Remove default mobile styling */
    -moz-appearance: none;
    appearance: none;
}
.input-field::placeholder {
    color: #aaa;
}
.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb, 255, 102, 0), 0.15);
    background-color: var(--card-bg);
}

.input-label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Section Styling */
.section {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}
.section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* Recommendations Styling - Modernized */
.recommendations {
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    margin-top: 25px;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--warning-color);
    transition: border-left-color 0.3s ease;
}
.recommendations h3 {
    color: var(--warning-color);
    margin-bottom: 12px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s ease;
}
.recommendations ul {
    padding-left: 0;
    list-style: none;
}
.recommendations li {
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--text-color);
    padding-left: 18px;
    position: relative;
}
.recommendations li::before {
    content: "\2022"; /* Bullet point */
    color: var(--primary-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1.2em;
    position: absolute;
    left: 10px;
    top: 1px;
    transition: color 0.3s ease;
}

/* Buttons - Modernized */
.button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    width: 100%;
    transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
    text-align: center;
    display: inline-block;
    margin-top: 15px;
    box-shadow: var(--shadow-sm);
}
.button:active {
    transform: scale(0.98);
    box-shadow: none;
}
.button:hover {
     filter: brightness(1.1);
}

.save-button {
    background-color: var(--success-color);
}

.reset-button {
    background-color: var(--danger-color);
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 25px;
}
.button-group .button {
    flex: 1;
    margin-top: 0;
}

/* Bottom Navigation - Modernized */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.95); /* Slightly transparent */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-around;
    align-items: stretch; /* Stretch items vertically */
    box-shadow: 0 -2px 10px rgba(0,0,0,0.08);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    height: 100%;
    cursor: pointer;
    color: #999; /* Lighter grey for inactive */
    transition: color 0.2s ease, background-color 0.2s ease;
    padding: 8px 0 5px 0;
    position: relative;
}

.nav-item svg {
    width: 22px;
    height: 22px;
    margin-bottom: 5px;
    fill: currentColor;
    transition: transform 0.2s ease;
}

.nav-item span {
    font-size: 0.65rem; /* Smaller text */
    font-weight: 500;
    line-height: 1.2;
}

.nav-item.active {
    color: var(--primary-color);
}
.nav-item.active svg {
    transform: scale(1.1);
}
/* Optional: Add a small indicator for active item */
.nav-item::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: transform 0.3s ease, background-color 0.3s ease;
}
.nav-item.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* Notification - Modernized */
.notification {
    position: fixed;
    bottom: calc(var(--nav-height) + 15px);
    left: 50%;
    transform: translate(-50%, 10px);
    padding: 10px 20px;
    background-color: rgba(40, 40, 40, 0.9);
    color: white;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 1001;
    pointer-events: none;
    font-size: 0.85rem;
    white-space: nowrap;
}
.notification.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* --- Theme Switching --- */

/* Man Theme (mostly default) */
body.theme-man {
    --primary-color: var(--man-primary);
    --primary-rgb: 255, 102, 0;
    --secondary-color: var(--man-text);
    --background-color: var(--man-bg);
    --card-bg: #ffffff;
    --text-color: var(--man-text);
    --text-light: #666;
    --border-color: #e8e8ea;
    --warning-color: var(--man-accent);
}
body.theme-man .recommendations li::before {
     color: var(--man-primary);
}
body.theme-man .toggle-switch .slider {
    background-color: var(--man-primary);
}
body.theme-man .slider:before {
    background-color: white;
}
body.theme-man .tab.active {
    background-color: var(--man-primary);
    color: white;
}
body.theme-man .nav-item.active {
    color: var(--man-primary);
}
body.theme-man .nav-item.active::after {
    background-color: var(--man-primary);
}
body.theme-man .exercise-name {
    color: var(--man-primary);
}
body.theme-man .button {
    background-color: var(--man-primary);
}
body.theme-man .input-field:focus {
    border-color: var(--man-primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}
body.theme-man #create-workout .machine-item input[type="checkbox"] {
    accent-color: var(--man-primary);
}
body.theme-man #saved-workouts .saved-workout-name {
    color: var(--man-primary);
}


/* Woman Theme */
body.theme-woman {
    --primary-color: var(--woman-primary);
    --primary-rgb: 255, 126, 185;
    --secondary-color: var(--woman-text);
    --background-color: var(--woman-bg);
    --card-bg: #fff8fb;
    --text-color: var(--woman-text);
    --text-light: #a0a0a0; /* Lighter text for woman theme */
    --border-color: #fcddea;
    --warning-color: var(--woman-accent);
}
body.theme-woman header {
     background-color: var(--woman-primary);
}
body.theme-woman .tab.active {
    background-color: var(--woman-primary);
    color: white;
}
body.theme-woman .nav-item.active {
    color: var(--woman-primary);
}
body.theme-woman .nav-item.active::after {
    background-color: var(--woman-primary);
}
body.theme-woman .exercise-name {
    color: var(--woman-primary);
}
body.theme-woman .recommendations {
     border-left-color: var(--woman-accent);
     background-color: var(--card-bg);
}
body.theme-woman .recommendations h3 {
    color: var(--woman-accent);
}
body.theme-woman .recommendations li::before {
     color: var(--woman-primary);
}
body.theme-woman .button {
     background-color: var(--woman-primary);
}
body.theme-woman .save-button {
    background-color: #66d9a0; /* Cute green */
}
body.theme-woman .reset-button {
    background-color: #ff6b6b; /* Cute red */
}
body.theme-woman .input-field {
     background-color: var(--woman-bg);
}
body.theme-woman .input-field:focus {
     background-color: var(--card-bg);
     box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}
body.theme-woman #create-workout .machine-item input[type="checkbox"] {
    accent-color: var(--woman-primary);
}
body.theme-woman #saved-workouts .saved-workout-name {
     color: var(--woman-primary);
}
body.theme-woman .toggle-switch input:checked + .slider {
    background-color: var(--woman-primary);
}
body.theme-woman .toggle-switch .slider:before {
    background-color: white;
}

/* Create Workout Section - Modernized */
#create-workout .machine-list {
    max-height: 250px; /* Slightly smaller */
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 10px;
    margin-bottom: 20px;
    background-color: var(--card-bg);
}
#create-workout h4 {
     font-size: 0.9rem;
     color: var(--text-light);
     margin-top: 10px;
     margin-bottom: 5px;
     padding-bottom: 5px;
     border-bottom: 1px dashed var(--border-color);
}
#create-workout h4:first-of-type {
     margin-top: 0;
}
#create-workout .machine-item {
    display: flex;
    align-items: center;
    padding: 10px 5px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.1s ease;
}
#create-workout .machine-item:last-child {
    border-bottom: none;
}
#create-workout .machine-item:hover {
     background-color: rgba(var(--primary-rgb, 255, 102, 0), 0.05);
}
#create-workout .machine-item input[type="checkbox"] {
    margin-right: 12px;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    flex-shrink: 0;
}
#create-workout .machine-item label {
    flex-grow: 1;
    font-size: 0.9rem;
    cursor: pointer;
}
#create-workout .selected-exercises .exercise-card {
     border: 1px solid var(--success-color);
     box-shadow: 0 0 5px rgba(40, 167, 69, 0.2);
}
#create-workout #selected-exercises p {
     text-align: center;
     color: var(--text-light);
     font-size: 0.9rem;
     padding: 20px;
}

/* Saved Workouts Section - Modernized */
#saved-workouts .saved-workout-item {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}
#saved-workouts .saved-workout-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}
#saved-workouts .saved-workout-name {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--primary-color);
    transition: color 0.3s ease;
    flex-grow: 1;
    margin-right: 10px;
}
#saved-workouts .delete-workout-btn {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 5px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}
#saved-workouts .delete-workout-btn:hover {
     opacity: 1;
}
#saved-workouts .delete-workout-btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}
#saved-workouts .saved-workout-details {
    display: none;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px dashed var(--border-color);
}
#saved-workouts .saved-workout-details.visible {
    display: block;
}
#saved-workouts .saved-workout-details p {
     font-size: 0.85rem;
     margin-bottom: 5px;
     color: var(--text-color);
}
#saved-workouts .saved-workout-details p strong {
     color: var(--secondary-color);
     font-weight: 600;
}
#saved-workouts > p {
     text-align: center;
     color: var(--text-light);
     font-size: 0.9rem;
     padding: 20px;
}

/* Simple Cinnamoroll SVG */
.cinnamoroll-svg {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    fill: var(--primary-color);
    transition: fill 0.3s ease;
}