/* ==================================== */

/* ==================================== */
/* Personal Ads Section */
/* ==================================== */
.personal-ads {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border-top: 1px solid rgba(255,255,255,0.03);
    padding: 18px 0;
}
.personal-ads .ad-container {
    display: flex;
    justify-content: center;
    align-items: center;
}
.personal-ads .ads-inner {
    display: flex;
    gap: 18px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}
.personal-ads .ad-item {
    display: block;
    border-radius: 10px;
    overflow: hidden;
    background: rgba(0,0,0,0.2);
    border: 1px solid rgba(255,255,255,0.03);
    box-shadow: var(--shadow-light);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.personal-ads .ad-item img {
    display: block;
    width: 360px;
    max-width: calc(100vw - 120px);
    height: auto;
    vertical-align: middle;
}
.personal-ads .ad-item:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 12px 30px rgba(0,0,0,0.45);
}

@media (max-width: 800px) {
    .personal-ads .ad-item img {
        width: 300px;
    }
}

@media (max-width: 480px) {
    .personal-ads { padding: 12px 0; }
    .personal-ads .ad-item img { width: 100%; max-width: 320px; }
}
/* 1. Global Styles & Variables */
/* ==================================== */

:root {
    --primary-bg: #0f172a;
    --secondary-bg: #1e293b;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --border-color: #334155;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    background: #0f172a;
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

/* ==================================== */
/* 2. Navigation */
/* ==================================== */

.nav-wrapper {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    gap: 10px;
    transition: var(--transition);
}

.nav-brand:hover {
    color: var(--accent-color);
    transform: translateY(-1px);
}

.nav-brand i {
    color: var(--accent-color);
    font-size: 1.8rem;
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--accent-color);
    border-radius: 2px;
    animation: slideIn 0.3s ease-out;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 4px;
    transition: var(--transition);
}

.mobile-menu-btn:hover span {
    background: var(--accent-color);
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ==================================== */
/* 3. Header */
/* ==================================== */

header {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="%23ffffff" opacity="0.1"><polygon points="1000,100 1000,0 0,100"/></svg>');
    background-size: cover;
    animation: float 20s ease-in-out infinite;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    animation: fadeInUp 1s ease-out;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: slideInUp 0.8s ease-out;
}

header p {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
    animation: slideInUp 0.8s ease-out 0.2s both;
}

/* ==================================== */
/* 4. Main Content & Cards */
/* ==================================== */

main {
    padding: 60px 0;
}

.welcome {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeIn 1s ease-out;
}

.welcome h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    animation: slideInUp 0.8s ease-out;
}

.welcome p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    animation: slideInUp 0.8s ease-out 0.2s both;
}

/* Tool Grid Layout */
.tool-grid,
.file-tools-grid,
.color-tools-grid,
.unit-converters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

/* Card Styles */
.tool-card,
.file-tool-card,
.color-tool-card,
.converter-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

.tool-card::before,
.file-tool-card::before,
.color-tool-card::before,
.converter-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.tool-card:hover::before,
.file-tool-card:hover::before,
.color-tool-card:hover::before,
.converter-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover,
.file-tool-card:hover,
.color-tool-card:hover,
.converter-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.tool-icon,
.converter-icon {
    width: 60px;
    height: 60px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition);
}

.tool-card:hover .tool-icon,
.converter-card:hover .converter-icon {
    background: rgba(59, 130, 246, 0.2);
    transform: scale(1.05);
}

.tool-icon i,
.converter-icon i {
    font-size: 1.8rem;
    color: var(--accent-color);
    transition: var(--transition);
}

.tool-card h3,
.file-tool-card h3,
.color-tool-card h3,
.converter-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-description,
.converter-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 4.5. Calculator Specific Styles */

.pass-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 15px 0;
}

.pass-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.password-result-container {
    position: relative;
    margin-top: 15px;
}

.password-result-container input {
    padding-right: 50px;
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    background: var(--primary-bg) !important;
}

.copy-password-btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
}

.copy-password-btn:hover {
    background: var(--accent-color);
    color: white;
}

/* ==================================== */
/* 5. Form Elements */
/* ==================================== */

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    margin-bottom: 15px;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

input[type="color"] {
    width: 60px;
    height: 60px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: none;
    transition: var(--transition);
}

input[type="color"]:hover {
    transform: scale(1.1);
}

input[type="file"] {
    width: 100%;
    padding: 12px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    margin-bottom: 15px;
    transition: var(--transition);
}

input[type="file"]:hover {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.05);
}

textarea {
    min-height: 120px;
    resize: vertical;
    font-family: inherit;
    transition: var(--transition);
}

textarea:focus {
    min-height: 140px;
}

/* ==================================== */
/* 6. Buttons */
/* ==================================== */

button,
.tool-action-btn,
.convert-btn {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

button::before,
.tool-action-btn::before,
.convert-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

button:hover::before,
.tool-action-btn:hover::before,
.convert-btn:hover::before {
    left: 100%;
}

button:hover,
.tool-action-btn:hover,
.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

button:active,
.tool-action-btn:active,
.convert-btn:active {
    transform: translateY(0);
}

button.loading,
.tool-action-btn.loading,
.convert-btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

button.success,
.tool-action-btn.success,
.convert-btn.success {
    background: linear-gradient(135deg, var(--success-color), #0da271);
}

.convert-main-btn {
    width: 100%;
    justify-content: center;
    padding: 15px;
    font-size: 1.1rem;
    margin: 20px 0;
}

.swap-btn {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.swap-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: rotate(180deg) scale(1.1);
}

.swap-btn.loading {
    animation: spin 1s linear infinite;
}

.copy-btn {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
    transition: var(--transition);
}

.copy-btn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
}

.refresh-btn {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.refresh-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: rotate(180deg);
}

.refresh-btn.loading {
    animation: spin 1s linear infinite;
}

/* Secondary button variant */
.tool-action-btn.secondary {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
}

.tool-action-btn.secondary:hover {
    background: var(--accent-color);
    color: white;
}

/* ==================================== */
/* 7. Text Tools Specific Styles */
/* ==================================== */

.text-tools-container {
    display: grid;
    gap: 30px;
}

.text-input-section {
    background: var(--secondary-bg);
    border-radius: var(--radius);
    padding: 30px;
    border: 1px solid var(--border-color);
    animation: slideInUp 0.6s ease-out;
}

.text-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 20px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(15, 23, 42, 0.8);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.stat-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-color);
    transition: var(--transition);
}

.stat-item:hover .stat-value {
    color: var(--accent-hover);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.tool-category {
    background: var(--secondary-bg);
    border-radius: var(--radius);
    padding: 30px;
    border: 1px solid var(--border-color);
    animation: slideInUp 0.6s ease-out;
}

.tool-category h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.category-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.tool-buttons {
    display: grid;
    gap: 10px;
}

.tool-btn {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 15px;
    border-radius: var(--radius-sm);
    text-align: left;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.tool-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s;
}

.tool-btn:hover::before {
    left: 100%;
}

.tool-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--text-primary);
    border-color: var(--accent-color);
    transform: translateX(5px);
}

.tool-tip {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
    line-height: 1.3;
}

.output-section {
    background: var(--secondary-bg);
    border-radius: var(--radius);
    padding: 30px;
    border: 1px solid var(--border-color);
    animation: slideInUp 0.6s ease-out 0.2s both;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.output-placeholder {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

.output-placeholder i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
    animation: pulse 2s infinite;
}

/* ==================================== */
/* 8. File Tools Specific Styles */
/* ==================================== */

.file-input {
    background: rgba(15, 23, 42, 0.8);
    border: 2px dashed var(--border-color);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
}

.file-input:hover {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.05);
}

.file-info {
    background: rgba(15, 23, 42, 0.9);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    margin-top: 10px;
    border: 1px solid var(--border-color);
    animation: slideInDown 0.3s ease-out;
}

.text-input {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    margin-bottom: 15px;
    transition: var(--transition);
}

.text-input:focus {
    background: rgba(15, 23, 42, 0.9);
}

.performance-notice {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius);
    padding: 30px;
    margin: 30px 0;
    animation: fadeIn 0.6s ease-out;
}

#qrOutput {
    flex-direction: column;
    justify-content: center;
    gap: 15px;
}

#qrcode-canvas {
    padding: 10px;
    background: white;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.notice-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.notice-content i {
    font-size: 2rem;
    color: var(--accent-color);
}

/* ==================================== */
/* 9. Color Tools Specific Styles */
/* ==================================== */

.color-details {
    background: rgba(15, 23, 42, 0.8);
    padding: 30px;
    border-radius: var(--radius-sm);
    margin: 15px 0;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.color-details:hover {
    border-color: var(--accent-color);
}

.color-value {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.color-value:hover {
    background: rgba(59, 130, 246, 0.05);
}

.color-value:last-child {
    border-bottom: none;
}

.color-swatch {
    width: 100px;
    height: 100px;
    border-radius: var(--radius);
    margin: 15px auto;
    border: 3px solid var(--border-color);
    transition: var(--transition);
    animation: fadeIn 0.5s ease-out;
}

.color-swatch:hover {
    transform: scale(1.05);
    border-color: var(--accent-color);
}

.color-swatch-large {
    width: 120px;
    height: 120px;
    border-radius: var(--radius);
    margin: 15px auto;
    border: 3px solid var(--border-color);
    transition: var(--transition);
    animation: fadeIn 0.5s ease-out;
}

.color-swatch-small {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.color-swatch-small:hover {
    transform: scale(1.1);
    border-color: var(--accent-color);
}

.color-preview {
    text-align: center;
    margin: 15px 0;
}

.gradient-preview {
    height: 80px;
    border-radius: var(--radius-sm);
    margin: 15px 0;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    animation: gradientShift 3s ease-in-out infinite;
}

.gradient-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
}

.color-pair {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
}

.angle-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.angle-unit {
    color: var(--text-secondary);
    font-weight: 600;
}

.conversion-group {
    margin-bottom: 20px;
    animation: slideInUp 0.4s ease-out;
}

.random-color-display {
    text-align: center;
    margin: 20px 0;
    animation: fadeIn 0.6s ease-out;
}

.complement-display {
    text-align: center;
    margin: 20px 0;
}

.color-with-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.color-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.color-tips {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius);
    padding: 30px;
    margin: 30px 0;
    animation: fadeIn 0.6s ease-out;
}

.tips-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.tips-content i {
    font-size: 2rem;
    color: var(--warning-color);
}

/* ==================================== */
/* 10. Unit Converter Specific Styles */
/* ==================================== */

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.input-group input,
.input-group select {
    margin-bottom: 0;
}

.conversion-arrow {
    text-align: center;
    margin: 10px 0;
    color: var(--accent-color);
    animation: bounce 2s infinite;
}

.result {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success-color);
    padding: 15px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    font-size: 1.2rem;
    margin-top: 15px;
    transition: var(--transition);
    animation: slideInUp 0.3s ease-out;
}

.result:hover {
    background: rgba(16, 185, 129, 0.15);
    transform: translateY(-2px);
}

.conversion-tips {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius);
    padding: 30px;
    margin: 30px 0;
    animation: fadeIn 0.6s ease-out;
}

/* ==================================== */
/* 11. Currency Converter Specific Styles */
/* ==================================== */

.currency-converter-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-bottom: 50px;
}

.converter-main,
.exchange-rates {
    background: var(--secondary-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    animation: slideInUp 0.6s ease-out;
}

.converter-header,
.rates-header {
    padding: 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
    position: relative;
}

.rates-header {
    justify-content: space-between;
}

.amount-section {
    padding: 30px;
    border-bottom: 1px solid var(--border-color);
}

.amount-input {
    position: relative;
    max-width: 300px;
}

.currency-symbol {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-weight: 600;
    transition: var(--transition);
}

.amount-input input {
    padding-left: 40px;
}

.currency-selector {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 30px;
    align-items: end;
    border-bottom: 1px solid var(--border-color);
}

.currency-from,
.currency-to {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.swap-currencies {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-bottom: 20px;
}

.conversion-result {
    padding: 30px;
}

.result-header {
    margin-bottom: 15px;
}

.result-content {
    background: rgba(15, 23, 42, 0.8);
    border-radius: var(--radius-sm);
    padding: 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.result-content:hover {
    border-color: var(--accent-color);
}

.rate-info {
    padding: 30px;
    background: rgba(59, 130, 246, 0.1);
    border-top: 1px solid rgba(59, 130, 246, 0.3);
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-color);
    animation: fadeIn 0.6s ease-out;
}

.rates-info {
    padding: 30px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.5);
}

.rates-grid {
    padding: 30px;
    display: grid;
    gap: 10px;
    max-height: 400px;
    overflow-y: auto;
}

.rate-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: rgba(15, 23, 42, 0.8);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    animation: slideInRight 0.4s ease-out;
}

.rate-item:nth-child(even) {
    animation-delay: 0.1s;
}

.rate-item:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--accent-color);
    transform: translateX(5px);
}

.rate-item.loading {
    animation: pulse 1.5s infinite;
}

.rate-item.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--error-color);
}

.currency-code {
    font-weight: 600;
    color: var(--text-primary);
}

.rate-value {
    color: var(--success-color);
    font-weight: 600;
    transition: var(--transition);
}

.rate-item:hover .rate-value {
    color: var(--accent-color);
}

.conversion-success {
    animation: slideInUp 0.5s ease-out;
}

.conversion-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: 10px;
}

.conversion-details {
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.exchange-rate {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.rate-source {
    color: var(--text-muted);
    font-size: 0.8rem;
    opacity: 0.7;
}

.conversion-error {
    color: var(--error-color);
    text-align: center;
    animation: shake 0.5s ease-in-out;
}

.currency-tools {
    margin-top: 50px;
    animation: fadeIn 0.8s ease-out;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* ==================================== */
/* 12. Blog Section */
/* ==================================== */

.blog-section {
    background: var(--secondary-bg);
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
}

.blog-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-primary);
    animation: slideInUp 0.6s ease-out;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.blog-card {
    background: var(--primary-bg);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    animation: fadeInUp 0.6s ease-out;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.blog-content {
    padding: 30px;
}

.blog-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    transition: var(--transition);
}

.blog-card:hover .blog-content h3 {
    color: var(--accent-color);
}

.blog-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.read-more {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.read-more:hover {
    gap: 10px;
    color: var(--accent-hover);
}

/* ==================================== */
/* 13. Footer */
/* ==================================== */

.site-footer {
    background: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.footer-section h3,
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
    transform: translateX(3px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 25px 0;
    text-align: center;
    color: var(--text-muted);
}

/* ==================================== */
/* 14. Utility Classes */
/* ==================================== */

.error {
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.1);
    padding: 10px 15px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(239, 68, 68, 0.3);
    margin: 10px 0;
    animation: shake 0.5s ease-in-out;
}

.output {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-top: 15px;
    min-height: 60px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.output:hover {
    border-color: var(--accent-color);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden {
    display: none !important;
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* ==================================== */
/* 15. Animations */
/* ==================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideIn {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* Apply animations to elements */
.tool-card,
.file-tool-card,
.color-tool-card,
.converter-card,
.blog-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading animation */
.loading {
    animation: pulse var(--pulse-duration) infinite;
}

/* ==================================== */
/* 16. Scrollbar Styling */
/* ==================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--primary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* ==================================== */
/* 17. Responsive Design */
/* ==================================== */

@media (max-width: 1024px) {
    .currency-converter-container {
        grid-template-columns: 1fr;
    }
    
    .tool-grid,
    .file-tools-grid,
    .color-tools-grid,
    .unit-converters-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    header h1 {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--secondary-bg);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

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

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 15px;
    }

    header {
        padding: 60px 0;
    }

    header h1 {
        font-size: 2.5rem;
    }

    header p {
        font-size: 1.1rem;
    }

    .welcome h2 {
        font-size: 2rem;
    }

    .text-stats {
        grid-template-columns: 1fr;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .currency-selector {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .swap-currencies {
        order: 3;
        padding-bottom: 0;
    }

    .input-group {
        flex-direction: column;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .color-pair {
        flex-direction: column;
    }
    
    .converter-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .tool-grid,
    .file-tools-grid,
    .color-tools-grid,
    .unit-converters-grid {
        grid-template-columns: 1fr;
    }

    .tool-card,
    .file-tool-card,
    .color-tool-card,
    .converter-card {
        padding: 20px;
    }

    header {
        padding: 40px 0;
    }

    header h1 {
        font-size: 2rem;
    }

    .welcome h2 {
        font-size: 1.8rem;
    }
    
    .color-swatch-large {
        width: 100px;
        height: 100px;
    }
    
    .conversion-amount {
        font-size: 1.5rem;
    }
}

/* Print Styles */
@media print {
    .nav-wrapper,
    .blog-section,
    .site-footer {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .tool-card,
    .converter-card {
        break-inside: avoid;
        border: 1px solid #ccc;
    }
}