:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: rgba(99, 102, 241, 0.3);
    --input-focus: rgba(99, 102, 241, 0.8);
    --gradient-1: #8b5cf6;
    --gradient-2: #3b82f6;
    --gradient-3: #ec4899;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Background Animated Shapes */
.background-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.5;
    animation: float 20s infinite alternate;
}

.shape-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--gradient-1) 0%, transparent 70%);
}

.shape-2 {
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--gradient-2) 0%, transparent 70%);
    animation-delay: -5s;
}

.shape-3 {
    top: 40%;
    left: 40%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--gradient-3) 0%, transparent 70%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(100px, 50px) scale(1.2); }
}

/* Main Container */
.container {
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.header h1 span {
    background: linear-gradient(to right, var(--gradient-1), var(--gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Cards (Glassmorphism) */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Upload Boxes */
.upload-group {
    margin-bottom: 1.5rem;
}

.upload-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-box:hover, .upload-box.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
}

.upload-box .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.upload-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.file-name {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.file-name.selected {
    color: var(--primary-color);
    font-weight: 500;
}

/* Buttons */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--gradient-1));
    color: white;
    box-shadow: 0 10px 20px -10px var(--primary-color);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -10px var(--primary-color);
    filter: brightness(1.1);
}

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

.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--card-border);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Forms & Inputs */
.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-muted);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group.full-width {
    margin-bottom: 2rem;
}

label {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}

input, textarea, select {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

.action-buttons .btn {
    width: auto;
    flex: 1;
}

/* Loader */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    position: absolute;
}

.hidden {
    display: none !important;
}

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

/* Success Section */
.success-content {
    text-align: center;
    padding: 2rem 0;
}

.success-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 2s infinite;
}

.success-content h2 {
    margin-bottom: 1rem;
    color: #4ade80;
}

.success-content p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Responsive */
@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .header h1 {
        font-size: 2.2rem;
    }
    
    .card {
        padding: 1.5rem;
    }
}