:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #2af598 0%, #009efd 100%);
    --bg-color: #f3f4f6;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    --btn-primary-bg: #4f46e5;
    --btn-primary-text: #ffffff;
    --btn-hover-transform: translateY(-2px);

    --font-main: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-x: hidden;
    user-select: none;
    -webkit-user-select: none;
}

textarea {
    -webkit-user-select: text !important;
    user-select: text !important;
}

/* Background Blobs for visual interest */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: #e0c3fc;
    animation: float 20s infinite alternate;
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: #8ec5fc;
    animation: float 25s infinite alternate-reverse;
}

@keyframes float {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(50px, 50px);
    }
}

.container {
    width: 90%;
    max-width: 1000px;
    padding: 2rem;
    z-index: 1;
}

.main-header {
    text-align: center;
    margin-bottom: 2rem;
}

.main-header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.main-header p {
    color: var(--text-muted);
    font-size: 1.25rem;
}

/* Converter Card - Glassmorphism */
.converter-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: var(--glass-shadow);
}

.textarea-wrapper {
    position: relative;
    margin-bottom: 2rem;
}

textarea {
    width: 100%;
    height: 350px;
    padding: 1.75rem;
    border: 2px solid transparent;
    border-radius: 16px;
    background-color: rgba(255, 255, 255, 0.6);
    font-family: var(--font-main);
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-main);
    resize: vertical;
    transition: all 0.3s ease;
    outline: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

textarea:focus {
    background-color: #ffffff;
    border-color: #a5b4fc;
    box-shadow: 0 0 0 4px rgba(165, 180, 252, 0.2);
}

.stats-bar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-top: 1rem;
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.separator {
    margin: 0 0.5rem;
    opacity: 0.5;
}

/* Controls */
.controls-area {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.transform-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.btn {
    border: none;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-transform {
    padding: 0.85rem 1.5rem;
    border-radius: 14px;
    background-color: white;
    color: var(--text-main);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    font-size: 1.05rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-transform:hover {
    transform: var(--btn-hover-transform);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background-color: #f9fafb;
    color: #4f46e5;
    border-color: #e0e7ff;
}

.btn-transform:active {
    transform: translateY(0);
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-action {
    padding: 0.85rem 1.75rem;
    border-radius: 14px;
    font-size: 1.1rem;
    font-weight: 600;
}

.btn-paste {
    background-color: #0ea5e9;
    color: white;
}

.btn-paste:hover {
    background-color: #0284c7;
    transform: var(--btn-hover-transform);
}

.btn-download {
    background-color: #10b981;
    color: white;
}

.btn-download:hover {
    background-color: #059669;
    transform: var(--btn-hover-transform);
}

.btn-copy {
    background-color: #4f46e5;
    color: white;
}

.btn-copy:hover {
    background-color: #4338ca;
    transform: var(--btn-hover-transform);
}

.btn-clear {
    background-color: #ef4444;
    color: white;
}

.btn-clear:hover {
    background-color: #dc2626;
    transform: var(--btn-hover-transform);
}


/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: #1f2937;
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 100;
    font-weight: 500;
}

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

/* Responsive */
@media (max-width: 768px) {
    .main-header h1 {
        font-size: 2.5rem;
    }

    .converter-card {
        padding: 1.5rem;
    }

    .transform-buttons {
        justify-content: stretch;
    }

    .btn-transform {
        flex: 1 1 calc(50% - 0.75rem);
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-action {
        width: 100%;
    }
}

/* Content Section */
.content-section {
    margin-top: 4rem;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--glass-shadow);
}

.content-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    text-align: center;
}

.content-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 2rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    background: rgba(255, 255, 255, 0.5);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.8);
}

.feature-item h3 {
    font-size: 1.25rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.feature-item p {
    font-size: 1rem;
    text-align: left;
    margin-bottom: 0;
}

/* FAQ Section */
.faq-section {
    margin-top: 4rem;
    margin-bottom: 4rem;
}

.faq-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-main);
    text-align: center;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1rem 1.5rem;
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
}

.faq-item[open] {
    background: rgba(255, 255, 255, 0.95);
}

.faq-item summary {
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-main);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--btn-primary-bg);
    transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    margin-top: 1rem;
    margin-bottom: 0;
    font-size: 1rem;
    color: var(--text-muted);
    text-align: left;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}