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

:root {
    --bg-color: #0f172a;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --blob-color: #818cf8;
}

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

/* Interactive Background */
.bg-blob {
    position: absolute;
    width: 40vw;
    height: 40vw;
    background: linear-gradient(110deg, #ec4899, #8b5cf6, #3b82f6);
    border-radius: 50%;
    filter: blur(8vw);
    z-index: -2;
    animation: pulse 10s infinite alternate;
    left: 50%;
    top: 50%;
    translate: -50% -50%;
    opacity: 0.6;
    transition: left 0.3s cubic-bezier(0.2, 0, 0, 1), top 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.bg-blur {
    position: absolute;
    inset: 0;
    backdrop-filter: blur(80px);
    -webkit-backdrop-filter: blur(80px);
    z-index: -1;
}

@keyframes pulse {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.2) rotate(45deg); }
}

/* Glass Container */
.glass-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 48px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    text-align: center;
    z-index: 1;
    animation: floatIn 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

.header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -1px;
}

.header h1 span {
    color: var(--accent-color);
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
    line-height: 1.5;
}

/* Form Styles */
.input-group {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 6px;
    transition: all 0.3s ease;
}

.input-group:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

input[type="url"] {
    flex: 1;
    background: transparent;
    border: none;
    padding: 16px 20px;
    color: var(--text-primary);
    font-size: 1.1rem;
    outline: none;
    font-family: inherit;
}

input[type="url"]::placeholder {
    color: #64748b;
}

button[type="submit"] {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0 28px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

button[type="submit"]:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--accent-color);
}

button[type="submit"]:active {
    transform: translateY(0);
}

/* Results */
.hidden {
    display: none !important;
}

#result-container {
    margin-top: 32px;
    animation: fadeIn 0.5s ease;
}

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

.result-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.short-url-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px dashed var(--glass-border);
    padding: 16px 20px;
    border-radius: 16px;
    gap: 16px;
}

#short-url {
    color: #818cf8;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.2rem;
    word-break: break-all;
    text-align: left;
    transition: color 0.3s;
}

#short-url:hover {
    color: #c7d2fe;
}

#copy-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

#copy-btn.copied {
    background: #10b981;
    border-color: #10b981;
    color: white;
}

.error {
    color: #ef4444;
    margin-top: 20px;
    font-size: 0.95rem;
    padding: 12px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 12px;
}

/* Responsiveness */
@media (max-width: 600px) {
    .glass-container {
        padding: 32px 24px;
    }
    
    .input-group {
        flex-direction: column;
        background: transparent;
        border: none;
        padding: 0;
        gap: 12px;
    }

    input[type="url"] {
        background: rgba(0, 0, 0, 0.2);
        border: 1px solid var(--glass-border);
        border-radius: 12px;
    }

    button[type="submit"] {
        padding: 16px;
        justify-content: center;
    }

    .short-url-box {
        flex-direction: column;
    }

    #copy-btn {
        width: 100%;
        justify-content: center;
    }
}


/* Logo Styles */
.app-logo {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    animation: float 4s ease-in-out infinite;
}

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