:root {
    --bg-color: #0f172a;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

/* Dynamic Animated Background Shapes */
.background-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

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

.shape-1 {
    top: -10%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: #ec4899;
    animation-delay: 0s;
}

.shape-2 {
    bottom: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: #6366f1;
    animation-delay: -5s;
}

.shape-3 {
    top: 40%;
    left: 40%;
    width: 300px;
    height: 300px;
    background: #14b8a6;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* Glassmorphism Container */
.container {
    position: relative;
    z-index: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.container:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.6);
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    font-weight: 800;
    font-size: 2rem;
    margin-bottom: 8px;
    background: linear-gradient(to right, #a855f7, #ec4899);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Input Section */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 30px;
}

input[type="url"] {
    width: 100%;
    padding: 14px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-main);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: all 0.3s ease;
}

input[type="url"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
    background: rgba(0, 0, 0, 0.4);
}

button {
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: 12px;
    background: var(--primary);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

button:active {
    transform: translateY(0);
}

/* Result Section */
.qr-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 16px;
    padding: 24px;
    min-height: 240px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.qr-result.has-qr {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

#qrcode {
    margin-bottom: 20px;
    padding: 10px;
    background: white;
    border-radius: 8px;
    display: none;
    animation: scaleIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

#qrcode.show {
    display: block;
}

#qrcode canvas,
#qrcode img {
    display: block;
    width: 200px;
    height: 200px;
    max-width: 100%;
}

.helper-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

#download-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: none;
    margin-top: 10px;
}

#download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.hidden {
    display: none !important;
}

@keyframes scaleIn {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}