@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-main: #0B0A12;
    --bg-surface: rgba(20, 18, 33, 0.7);
    --bg-card: rgba(30, 27, 50, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(139, 92, 246, 0.4);
    
    --primary: #8B5CF6;
    --primary-glow: rgba(139, 92, 246, 0.15);
    --primary-hover: #A78BFA;
    --secondary: #06B6D4;
    --secondary-glow: rgba(6, 182, 212, 0.15);
    
    --text-primary: #F3F4F6;
    --text-muted: #9CA3AF;
    --text-success: #10B981;
    --text-error: #EF4444;
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --radius-lg: 16px;
    --radius-md: 12px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
    width: 100%;
}

/* Header & Logo */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-family: var(--font-heading);
    color: white;
    box-shadow: 0 0 20px var(--primary-glow);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #ffffff, #d8b4fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Hero Section */
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    align-items: center;
    margin: 0.5rem auto 1.5rem auto;
    max-width: 1200px;
}

.hero-title-col {
    text-align: left;
}

.hero-desc-col {
    text-align: left;
    border-left: 2px solid var(--border-color);
    padding-left: 1.5rem;
}

.badge {
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: var(--primary-hover);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-title-col h1 {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 800;
    line-height: 1.15;
    margin: 0;
    letter-spacing: -1px;
    background: linear-gradient(to right, #ffffff, #e9d5ff, #c7d2fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        margin: 0.5rem auto 1.25rem auto;
    }
    .hero-title-col h1 {
        font-size: 1.75rem;
    }
    .hero-desc-col {
        border-left: none;
        padding-left: 0;
    }
}

.hero-desc-col p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

/* Grid Layout */
.main-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 992px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* Card Styling */
.card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: rgba(139, 92, 246, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-title i {
    color: var(--primary-hover);
}

/* Form inputs */
.form-group-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group.full-width {
    grid-column: span 2;
}

@media (max-width: 480px) {
    .form-group.full-width {
        grid-column: span 1;
    }
}

label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"] {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.6rem 0.85rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Drag & Drop Zone */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    background: rgba(255, 255, 255, 0.01);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.03);
}

.drop-icon {
    font-size: 2rem;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.drop-zone:hover .drop-icon, .drop-zone.dragover .drop-icon {
    color: var(--primary-hover);
    transform: translateY(-5px);
}

.drop-zone p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.drop-zone span {
    color: var(--text-primary);
    font-weight: 600;
}

/* File info / Status */
.file-status {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    display: none;
    align-items: center;
    justify-content: space-between;
}

.file-info-text {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.btn-convert {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 1rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    margin-top: 1.5rem;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-convert:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
    filter: brightness(1.1);
}

.btn-convert:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Download Section */
.download-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.download-details {
    margin-bottom: 2rem;
}

.download-features {
    list-style: none;
    margin-top: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.download-features li {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-features li svg {
    color: var(--text-success);
    flex-shrink: 0;
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    padding: 1.1rem;
    font-weight: 700;
    transition: var(--transition-smooth);
    width: 100%;
}

.btn-download:hover {
    background: white;
    color: var(--bg-main);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.counter-container {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    align-self: center;
}

.counter-number {
    color: var(--secondary);
    font-weight: 700;
    font-size: 0.95rem;
}

/* Steps / Tutorial Section */
.steps-section {
    margin-bottom: 4rem;
}

.steps-section h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin-bottom: 2rem;
    text-align: center;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    position: relative;
}

.step-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    color: rgba(255, 255, 255, 0.05);
    line-height: 1;
}

.step-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.step-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Footer */
footer {
    margin-top: auto;
    padding: 2.5rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Alert Notification Banner */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-top: 1.5rem;
    display: none;
    font-size: 0.9rem;
    animation: slideUp 0.3s ease;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #a7f3d0;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}