:root {
    --primary: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --bg-dark: #0f172a;
    --card-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #f43f5e;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', 'Noto Sans KR', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    filter: blur(80px);
}

.blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.4;
    animation: float 20s infinite alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: var(--secondary);
    bottom: -150px;
    left: -150px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(100px, 50px) scale(1.1); }
}

/* Container */
.app-container {
    width: 90%;
    max-width: 1000px;
    padding: 3rem 1rem;
    z-index: 10;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: 3.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.highlight {
    background: linear-gradient(to right, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Drop Zone */
.upload-section {
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.drop-zone {
    background: var(--card-bg);
    border: 2px dashed var(--glass-border);
    border-radius: 24px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.icon-box {
    width: 80px;
    height: 80px;
    background: rgba(79, 70, 229, 0.1);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 1.5rem;
    color: var(--primary-light);
}

.icon-box svg {
    width: 40px;
    height: 40px;
}

.main-text {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.sub-text {
    color: var(--text-muted);
}

/* Results Section */
.result-section {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 2rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    animation: fadeInUp 0.8s ease-out;
}

.hidden {
    display: none;
}

.table-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--glass-border);
}

td {
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--glass-border);
    font-size: 1.1rem;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Loader */
.loader-container {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--primary-light);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

/* Mobile Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    .drop-zone { padding: 2rem 1rem; }
}