/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --background: #ffffff;
    --surface: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --header-bg: #FBF9F6;
    --body-gradient-start: #C8E2ED;
    --body-gradient-end: #E0ECE0;
    --card-bg: #FBF9F6;
    --hero-text: #0d0c47;
    --logo-text: #0d0c47;
}

[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --secondary-color: #94a3b8;
    --success-color: #34d399;
    --danger-color: #f87171;
    --background: #1e293b;
    --surface: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #475569;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --header-bg: #1e293b;
    --body-gradient-start: #090915;
    --body-gradient-end: #1e293b;
    --card-bg: #334155;
    --hero-text: #f1f5f9;
    --logo-text: #f1f5f9;
}

body {
    font-family: 'Varela Round', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(to top, var(--body-gradient-start), var(--body-gradient-end));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

/* Container Variants - Unified Spacing System */
.container-medium {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

.container-extra-narrow {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

/* Gap Utility Classes - Standardized Spacing */
.gap-xs { gap: 0.5rem; }   /* 8px - for tight spacing */
.gap-sm { gap: 0.75rem; }  /* 12px - for small spacing */
.gap-md { gap: 1rem; }     /* 16px - for medium spacing */
.gap-lg { gap: 1.5rem; }   /* 24px - for large spacing */
.gap-xl { gap: 2rem; }     /* 32px - for extra large spacing */

/* List Indentation - Standardized */
.list-indent {
    padding-left: 1.5rem;
}

ul.list-indent,
ol.list-indent {
    margin-left: 1.5rem;
    padding-left: 0;
}

/* Header and Navigation */
header {
    background: var(--header-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background 0.3s ease;
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

.logo:hover {
    opacity: 0.8;
}

.logo-img {
    height: 34px;
    width: auto;
    max-width: 80px;
    object-fit: contain;
    display: inline-block;
}

.logo .logo-text,
.logo-text {
    display: inline-block;
    font-family: 'Varela Round', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700 !important;
    letter-spacing: -0.5px;
    font-size: 1.75rem !important;
    color: var(--logo-text) !important;
    transition: color 0.3s ease;
}

.logo-img[style*="display: none"] + .logo-text {
    display: inline-block;
}

.navbar {
    position: relative;
}

.nav-menu {
    position: absolute;
    top: 100%;
    right: 0;
    flex-direction: column;
    background-color: var(--header-bg);
    width: 250px;
    text-align: left;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background-color 0.3s;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 0;
    gap: 0;
    z-index: 1000;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    border-radius: 8px;
    overflow: hidden;
}

.nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu li {
    border-bottom: 1px solid var(--border-color);
}

.nav-menu li:last-child {
    border-bottom: none;
}

.nav-menu a {
    display: block;
    padding: 1rem 2rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s, color 0.2s;
}

.nav-menu a:hover {
    background-color: var(--surface);
    color: var(--primary-color);
}


.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 5px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
    display: block;
}

.mobile-menu-toggle:hover span {
    background: var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 0 7rem 0; /* Add bottom padding for Ko-fi widget */
}

/* Cards */
.card {
    background: var(--background);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--background);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-secondary);
    opacity: 1;
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

[data-theme="dark"] .form-control:focus {
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--background);
    color: var(--text-primary);
    cursor: pointer;
}

[data-theme="dark"] .form-select {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.form-select option {
    background-color: var(--background);
    color: var(--text-primary);
}

[data-theme="dark"] .form-select option {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.form-select option[value=""] {
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background-color: #475569;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Grid */
.grid {
    display: grid;
    gap: 2rem;
    position: relative;
}

/* Ensure category cards grid has proper spacing for floating elements */
.grid-2,
.grid-3,
.grid-4 {
    padding-bottom: 7rem; /* Extra spacing for floating widgets - increased */
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Converter Tools */
.converter-tool {
    background: var(--surface);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.converter-result {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--background);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

[data-theme="dark"] .alert-success {
    background-color: #064e3b;
    color: #d1fae5;
    border-color: #34d399;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

[data-theme="dark"] .alert-error {
    background-color: #7f1d1d;
    color: #fee2e2;
    border-color: #f87171;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #3b82f6;
}

[data-theme="dark"] .alert-info {
    background-color: #1e3a8a;
    color: #dbeafe;
    border-color: #60a5fa;
}

/* Footer */
footer {
    background: var(--surface);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
}

footer p {
    margin: 0.5rem 0;
}

/* Homepage */
.hero {
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-family: 'Varela Round', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700;
    color: var(--hero-text);
    transition: color 0.3s ease;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.tool-categories {
    margin-top: 3rem;
    padding-bottom: 5rem; /* Add space for Ko-fi floating button */
    max-width: 1000px; /* Limit width to keep cards compact */
    margin-left: auto;
    margin-right: auto;
}

.category-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s, background 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.category-card .category-icon {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.category-card .category-icon img {
    width: 3rem;
    height: 3rem;
    object-fit: contain;
    transition: filter 0.3s ease;
}

[data-theme="dark"] .category-card .category-icon img {
    filter: brightness(1.5);
}

.category-card h3 {
    color: var(--hero-text);
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.category-card p {
    color: var(--text-secondary);
}

/* File Upload */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--surface);
}

.file-upload-area input[type="file"] {
    display: none;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: var(--surface);
}

.file-upload-area.dragover {
    border-color: var(--primary-color);
    background: var(--surface);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        width: 100%;
        right: 0;
        left: 0;
        border-radius: 0;
    }
}

@media (max-width: 768px) {
    .logo-img {
        height: 28px;
        max-width: 80px;
    }

    .logo {
        font-size: 1.25rem;
    }

    .hero h1 {
        font-size: 2rem;
        font-family: 'Varela Round', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        font-weight: 700;
        color: var(--hero-text);
    }

    .hero p {
        font-size: 1rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container,
    .container-medium,
    .container-narrow,
    .container-extra-narrow,
    .tool-categories {
        padding: 0 0.75rem;
    }

    .hero {
        padding: 2rem 0;
    }

    .hero h1 {
        font-size: 1.75rem;
        font-family: 'Varela Round', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        font-weight: 700;
        color: var(--hero-text);
    }
}

/* Feedback Section */
.feedback-section {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.feedback-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feedback-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    background-color: var(--background);
    color: var(--text-primary);
}

[data-theme="dark"] .feedback-form textarea {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.feedback-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.feedback-footer {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.char-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.feedback-form .feedback-footer button {
    padding: 1rem 2rem;
    background: var(--card-bg);
    color: var(--text-primary);
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s, background 0.3s ease;
    margin-left: auto;
    flex-shrink: 0;
}

.feedback-form button:hover {
    background: var(--card-bg);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .feedback-form {
        max-width: 100%;
    }
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-left: 1rem;
}

.dark-mode-toggle:hover {
    background: var(--surface);
    border-color: var(--primary-color);
}

.dark-mode-toggle svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.dark-mode-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .dark-mode-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .dark-mode-toggle .moon-icon {
    display: block;
}

@media (max-width: 768px) {
    .dark-mode-toggle {
        margin-left: 0.5rem;
        padding: 0.4rem 0.6rem;
        font-size: 0.85rem;
    }
    
    .dark-mode-toggle span {
        display: none;
    }
    
    .tool-categories {
        padding-bottom: 6rem; /* Extra space on mobile for Ko-fi button */
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        padding-bottom: 8rem; /* Extra space on mobile for Ko-fi button - increased */
    }
}

/* Ko-fi Widget - Simple padding to prevent overlap with category cards */

/* Adjust Ko-fi floating button position to avoid overlap */
@media (max-width: 1024px) {
    .tool-categories {
        padding-bottom: 6rem;
    }
}

/* On mobile, ensure extra spacing */
@media (max-width: 768px) {
    .tool-categories {
        padding-bottom: 6rem;
    }
    
    #kofi-widget-container,
    iframe[src*="ko-fi.com"],
    iframe[id*="kofi"],
    div[id*="kofi"],
    div[class*="kofi"],
    [data-kofi] {
        bottom: 20px !important;
        right: 20px !important;
        left: auto !important;
    }
}