/* style.css (Base Folder - Global + Home) */

/* Basic Reset & Variables */
:root {
    --background-color: #000000;
    --text-color: #FFFFFF;
    --text-muted-color: #AAAAAA;
    --primary-color: #4285f4;
    --green-color: #4CAF50;
    --red-color: #F44336;
    --card-bg: #191919;
    /* Darker background for elements */
    --flashcard-face-bg: #000000;
    /* Black for flashcard face (used in Preview) */
    --hover-bg: #2e2e2e;
    --padding-base: 15px;
    --thumbnail-size: 50px;
    --spacing-base: 10px;
    --border-radius-base: 8px;
    --font-family: 'Nunito', sans-serif;
    --large-thumbnail-size: 60px;
}

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

html,
body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    /* Prevent scrolling on body */
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    overscroll-behavior: none;
    /* Prevent pull-to-refresh */
    display: flex;
    /* Needed for centering loading */
    justify-content: center;
    /* Needed for centering loading */
    align-items: center;
    /* Needed for centering loading */
}

#app-container {
    position: relative;
    width: 100%;
    height: 100%;
    max-width: 600px;
    /* Optional: constrain max width for app feel */
    margin: 0 auto;
    overflow: hidden;
    /* Manage scrolling within sections */
    background-color: var(--background-color);
    /* Ensure container has bg */
    display: flex;
    /* Use flex for main layout */
    flex-direction: column;
}

/* Common Page structure (apply to page containers in each HTML) */
.page-content {
    flex-grow: 1;
    /* Allow content to fill space */
    overflow-y: auto;
    /* Allow scrolling within the content area */
    padding: var(--padding-base);
    display: flex;
    flex-direction: column;
    gap: calc(var(--padding-base) * 1.5);
    /* Spacing between sections */
}

/* --- Loading Spinner (Global) --- */
.spinner-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: 100%;
    /* Fill container */
    width: 100%;
    position: absolute;
    /* Overlay content */
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.8);
    /* Semi-transparent overlay */
    z-index: 100;
    /* Above other content */
    visibility: hidden;
    /* Hidden by default */
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.spinner-container.visible {
    visibility: visible;
    opacity: 1;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 4px solid var(--text-color);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin-bottom: var(--padding-base);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* --- Toast Message (Global) --- */
#toast-message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(150%);
    /* Initially hidden below */
    background-color: rgba(40, 40, 40, 0.9);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9em;
    z-index: 1000;
    /* Above everything */
    opacity: 0;
    transition: transform 0.4s ease-in-out, opacity 0.4s ease-in-out;
    white-space: nowrap;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    max-width: 90%;
    text-align: center;
}

#toast-message.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

#toast-message.success {
    background-color: rgba(76, 175, 80, 0.9);
}

/* Green */
#toast-message.error {
    background-color: rgba(244, 67, 54, 0.9);
}

/* Red */


/* --- Common Button Styles --- */
.icon-button,
.text-button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 5px;
    /* Add some padding for easier clicking */
    font-size: 1em;
    vertical-align: middle;
    /* Align icons/text */
    display: inline-flex;
    /* Use flex for alignment */
    align-items: center;
    justify-content: center;
}

.icon-button img {
    width: 28px;
    /* Consistent icon size */
    height: 28px;
    display: block;
}

.text-button {
    font-weight: 500;
    padding: 8px 12px;
    /* More padding for text buttons */
    border-radius: var(--border-radius-base);
    transition: background-color 0.2s ease;
}

.text-button:hover {
    background-color: var(--hover-bg);
}

/* Common list item style */
.set-item {
    display: flex;
    align-items: center;
    background-color: transparent;
    padding: var(--spacing-base);
    border-radius: var(--border-radius-base);
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-bottom: var(--spacing-base);
    /* Use margin instead of gap for broader compatibility */
}

.set-item:last-child {
    margin-bottom: 0;
}

.set-item:hover {
    background-color: var(--hover-bg);
}

.set-thumbnail {
    width: var(--thumbnail-size);
    height: var(--thumbnail-size);
    min-width: var(--thumbnail-size);
    /* Prevent shrinking */
    border-radius: 4px;
    margin-right: var(--padding-base);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3em;
    font-weight: bold;
    flex-shrink: 0;
    color: black;
    /* Set by JS based on contrast */
    overflow: hidden;
    /* Ensure content doesn't overflow */
    text-align: center;
}

.set-details {
    flex-grow: 1;
    overflow: hidden;
}

.set-title {
    font-size: 1em;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
    color: var(--text-color);
}

.set-message {
    font-size: 0.85em;
    color: var(--text-muted-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.google-ad {
    display: block;
    /* Make the list item take up the full width */
    text-align: center;
    /* Center the content within the list item */
    margin: 1em 0;
    /* Add some vertical spacing around the ad */
    padding: 1em;
    /* Add some padding inside the ad container */
}

.google-ad ins {
    display: block;
    /* Ensure the ad itself behaves as a block-level element */
    margin: 0 auto;
    /* Center the ad block horizontally if it has a fixed width */
}


/* Common quick item style */
.quick-item {
    display: flex;
    align-items: center;
    background-color: transparent;
    padding: var(--spacing-base);
    border-radius: var(--border-radius-base);
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-bottom: var(--spacing-base);
    /* Use margin instead of gap for broader compatibility */
}

.quick-item:last-child {
    margin-bottom: 0;
}

.quick-item:hover {
    background-color: var(--hover-bg);
}

.quick-thumbnail {
    width: var(--large-thumbnail-size);
    height: var(--large-thumbnail-size);
    min-width: var(--large-thumbnail-size);
    /* Prevent shrinking */
    border-radius: 4px;
    margin-right: var(--padding-base);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
    font-weight: bold;
    flex-shrink: 0;
    color: black;
    /* Set by JS based on contrast */
    overflow: hidden;
    /* Ensure content doesn't overflow */
    text-align: center;
}

.quick-details {
    flex-grow: 1;
    overflow: hidden;
}

.quick-title {
    font-size: 1.4em;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
    color: var(--text-color);
}

.quick-message {
    font-size: 1em;
    color: var(--text-muted-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}



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


/* --- Home Page Specific Styles (/index.html) --- */
.home-header {
    /* Renamed from flow-header for clarity */
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* Center items vertically */
    padding: var(--padding-base) var(--padding-base) 0;
    /* Padding top/sides */
    flex-shrink: 0;
    /* Prevent header from shrinking */
}

.greeting-section h1 {
    font-size: 1.7em;
    /* Slightly smaller */
    font-weight: bold;
    margin-bottom: 4px;
}

.greeting-section p {
    color: var(--text-muted-color);
    font-size: 1em;
}

.account-section #account-icon {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0.9;
    transition: opacity 0.2s ease;
    border: 1px solid var(--hover-bg);
    /* Subtle border */
}

.account-section #account-icon:hover {
    opacity: 1;
    border-color: var(--text-muted-color);
}

.home-search-container {
    /* Renamed */
    padding: var(--padding-base);
    /* Match header padding */
    flex-shrink: 0;
}

.home-search-container input {
    width: 100%;
    padding: 12px 15px;
    font-size: 1em;
    border: none;
    /* Removed border */
    border-radius: var(--border-radius-base);
    background-color: var(--card-bg);
    color: var(--text-color);
    outline: none;
}

.home-search-container input::placeholder {
    color: var(--text-muted-color);
}

.home-search-container input:focus {
    box-shadow: 0 0 0 2px var(--primary-color);
    /* Focus indicator */
}

.home-content {
    /* Container for streak and sets */
    flex-grow: 1;
    overflow-y: auto;
    padding: 0 var(--padding-base) var(--padding-base);
    /* Pad sides/bottom */
    display: flex;
    flex-direction: column;
    gap: calc(var(--padding-base) * 1.5);
}

.streak-container h2,
.sets-container h2 {
    font-size: 1.2em;
    margin-bottom: var(--spacing-base);
    color: var(--text-muted-color);
    padding-top: var(--spacing-base);
    /* Add space above headings */
}

.streak-circles {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-top: var(--spacing-base);
}

.streak-day {
    text-align: center;
}

.streak-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 5px;
    background-color: #333;
    /* Darker grey for empty */
    color: var(--text-color);
    /* White text */
    font-weight: bold;
    font-size: 0.9em;
    overflow: hidden;
}

.streak-progress-ring {
    position: absolute;
    top: -1px;
    left: -1px;
    width: calc(100% + 2px);
    height: calc(100% + 2px);
}

.streak-progress-ring circle {
    transition: stroke-dasharray 0.3s ease;
    /* Animate progress */
}

/* SVG Circle setup */
.streak-progress-ring .ring-bg {
    fill: transparent;
    stroke: #444;
    /* Slightly lighter background ring */
    stroke-width: 2;
}

.streak-progress-ring .ring-progress {
    fill: transparent;
    stroke: var(--green-color);
    /* Progress color */
    stroke-width: 2.5;
    /* Slightly thicker */
    stroke-linecap: round;
    /* Rounded ends */
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    stroke-dasharray: 100 100;
    /* Full circle, will be set by JS */
    stroke-dashoffset: 100;
    /* Start empty, set by JS */
}

/* Streak circle states */
.streak-circle.complete {
    background-color: var(--green-color);
    color: var(--text-color);
}

.streak-circle.complete .ring-progress {
    stroke: var(--green-color);
    /* Ensure stroke matches bg */
    stroke-dashoffset: 0;
    /* Full */
}

.streak-circle.in-progress .ring-progress {
    stroke: var(--green-color);
}

.streak-circle.empty {
    background-color: #333;
    color: var(--text-muted-color);
}

.streak-circle.empty .ring-progress {
    stroke-dashoffset: 100;
    /* Empty */
    stroke: transparent;
    /* Hide progress stroke */
}

.streak-circle.empty .ring-bg {
    stroke: transparent;
    /* Hide background stroke for empty */
}


.streak-day span {
    font-size: 0.8em;
    color: var(--text-muted-color);
}

.sets-container {
    flex-grow: 1;
    /* Allow sets list to take space if needed */
}

#recent-sets-list {
    list-style: none;
    padding: 0;
}

.create-new-item .set-thumbnail {
    background-color: var(--hover-bg);
    color: var(--text-muted-color);
    border: 1px dashed var(--text-muted-color);
}

.create-new-item:hover .set-thumbnail {
    background-color: #444;
    color: var(--text-color);
    border-color: var(--text-color);
}

.secondary-nav {
    display: flex;
    border-bottom: 1px solid var(--hover-bg);
    background-color: var(--background-color);
    flex-shrink: 0;
}

.secondary-nav .tab-button {
    padding: 12px 15px;
    cursor: pointer;
    border: none;
    background-color: transparent;
    border-bottom: 3px solid transparent;
    margin-bottom: -1px;
    font-size: 0.95em;
    color: var(--text-muted-color);
    flex-grow: 1;
    text-align: center;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    font-weight: 500;
}

.secondary-nav .tab-button:hover {
    background-color: var(--hover-bg);
    color: var(--text-color);
}

.secondary-nav .tab-button.active {
    border-bottom-color: var(--primary-color);
    color: var(--text-color);
    font-weight: 700;
}

.tab-content-section {
    display: none;
    /* Hide inactive tabs */
}

.tab-content-section.active {
    display: block;
    /* Show active tab */
    animation: fadeIn 0.3s ease;
    /* Reuse fade */
}