/* === 기본 스타일 === */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    font-family: 'Segoe UI', 'Malgun Gothic', '맑은 고딕', sans-serif;
    margin: 0;
    padding: 0;
    color: #1a1a2e;
    scroll-behavior: smooth;
}

a {
    color: #4f6cff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* === 히어로 섹션 === */
.hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 8rem 1.5rem 5rem;
}

.hero-split {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 3rem;
    align-items: center;
}

.hero-content {
    text-align: left;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
}

.hero-login-card {
    background: #fff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    color: #1a1a2e;
}

.hero-login-card h2 {
    font-size: 1.5rem;
    margin: 0 0 1.5rem;
    text-align: center;
}

.hero-welcome {
    text-align: center;
}

.welcome-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.8rem;
}

.hero-welcome h2 {
    font-size: 1.3rem;
    margin: 0 0 0.8rem;
}

.hero-welcome p {
    color: #555;
    margin: 0 0 1.5rem;
    font-size: 0.95rem;
}

.btn-download {
    display: block;
    background-color: #2e7d32;
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    margin-bottom: 0.8rem;
    transition: background-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(46, 125, 50, 0.3);
}

.btn-download:hover {
    background-color: #1b5e20;
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.4);
    color: #fff;
}

.approval-pending {
    color: #e65100;
    font-weight: 600;
    font-size: 0.95rem;
    margin: 0 0 1rem;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: #a0b4ff;
    margin: 0 0 1.5rem;
    font-weight: 300;
}

.hero-description {
    font-size: 1.1rem;
    color: #c0c8e8;
    line-height: 1.8;
    margin: 0 0 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero-primary {
    display: inline-block;
    background-color: #4f6cff;
    color: #fff;
    padding: 0.9rem 2.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: background-color 0.2s, transform 0.2s;
}

.btn-hero-primary:hover {
    background-color: #3a54e0;
    transform: translateY(-2px);
}

.btn-hero-secondary {
    display: inline-block;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    padding: 0.9rem 2.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: border-color 0.2s, background-color 0.2s;
}

.btn-hero-secondary:hover {
    border-color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
}

/* === 핵심 가치 섹션 === */
.highlights {
    padding: 5rem 0;
    background-color: #f8f9fc;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.highlight-card {
    background: #fff;
    border-radius: 12px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s, box-shadow 0.2s;
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

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

.highlight-card h3 {
    font-size: 1.25rem;
    margin: 0 0 0.8rem;
    color: #1a1a2e;
}

.highlight-card p {
    color: #555;
    line-height: 1.7;
    margin: 0;
}

/* === 소개 섹션 === */
.intro {
    padding: 5rem 0;
}

.intro-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.intro-content h2 {
    font-size: 2rem;
    margin: 0 0 1rem;
}

.intro-content > p {
    color: #555;
    line-height: 1.8;
    font-size: 1.05rem;
    margin: 0 0 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    color: #4f6cff;
}

.stat-label {
    font-size: 0.95rem;
    color: #777;
    margin-top: 0.3rem;
}

/* === CTA 섹션 === */
.cta {
    background: linear-gradient(135deg, #4f6cff, #6a3de8);
    color: #fff;
    text-align: center;
    padding: 5rem 1.5rem;
}

.cta h2 {
    font-size: 2rem;
    margin: 0 0 1rem;
}

.cta p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
    margin: 0 0 2rem;
}

.btn-cta {
    display: inline-block;
    background-color: #fff;
    color: #4f6cff;
    padding: 0.9rem 2.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* === 페이지 헤더 (서브 페이지) === */
.page-header {
    background: linear-gradient(135deg, #1a1a2e, #0f3460);
    color: #fff;
    text-align: center;
    padding: 8rem 1.5rem 4rem;
}

.page-header h1 {
    font-size: 2.5rem;
    margin: 0 0 0.8rem;
}

.page-header p {
    font-size: 1.1rem;
    color: #a0b4ff;
    margin: 0;
}

/* === 기능 상세 페이지 === */
.features-detail {
    padding: 4rem 0;
}

.feature-row {
    padding: 3rem 0;
    border-bottom: 1px solid #eee;
}

.feature-row:last-child {
    border-bottom: none;
}

.feature-text h2 {
    font-size: 1.6rem;
    margin: 0 0 1rem;
}

.feature-text p {
    color: #555;
    line-height: 1.8;
    font-size: 1.05rem;
    margin: 0 0 1.5rem;
}

.feature-text ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-text ul li {
    padding: 0.4rem 0;
    color: #444;
    position: relative;
    padding-left: 1.5rem;
}

.feature-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4f6cff;
    font-weight: 700;
}

/* === 문의 페이지 === */
.about-content {
    padding: 4rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: #f8f9fc;
    border-radius: 12px;
    padding: 2.5rem 2rem;
}

.about-card h2 {
    font-size: 1.4rem;
    margin: 0 0 1rem;
}

.about-card p {
    color: #555;
    line-height: 1.7;
    margin: 0 0 1.5rem;
}

.contact-link {
    color: #4f6cff;
    font-weight: 600;
    text-decoration: none;
}

.contact-link:hover {
    text-decoration: underline;
}

.system-requirements {
    background: #fff;
    border: 1px solid #e8e8f0;
    border-radius: 12px;
    padding: 3rem 2rem;
}

.system-requirements h2 {
    font-size: 1.6rem;
    margin: 0 0 2rem;
    text-align: center;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.requirement-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 1rem;
    background: #f8f9fc;
    border-radius: 8px;
}

.requirement-item strong {
    color: #1a1a2e;
    font-size: 0.9rem;
}

.requirement-item span {
    color: #555;
    font-size: 0.95rem;
}

/* === 에러 UI === */
.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

/* === 인증 페이지 === */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 8rem 1.5rem 4rem;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.auth-card {
    background: #fff;
    border-radius: 16px;
    padding: 3rem 2.5rem;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.auth-card h1 {
    font-size: 1.8rem;
    margin: 0 0 2rem;
    text-align: center;
    color: #1a1a2e;
}

.auth-error {
    background-color: #fee;
    color: #c00;
    border: 1px solid #fcc;
    border-radius: 8px;
    padding: 0.8rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.auth-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
    border-radius: 8px;
    padding: 0.8rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.auth-description {
    text-align: center;
    color: #555;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.auth-resend {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.auth-resend p {
    color: #888;
    font-size: 0.85rem;
    margin: 0 0 0.5rem;
}

.btn-resend {
    background: none;
    border: 1px solid #4f6cff;
    color: #4f6cff;
    padding: 0.5rem 1.2rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.btn-resend:hover {
    background-color: #4f6cff;
    color: #fff;
}

.btn-resend:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: #4f6cff;
    box-shadow: 0 0 0 3px rgba(79, 108, 255, 0.15);
}

.btn-auth {
    width: 100%;
    padding: 0.8rem;
    background-color: #4f6cff;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 0.5rem;
}

.btn-auth:hover {
    background-color: #3a54e0;
}

.btn-auth:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    background-color: #7b8fff;
}

.btn-auth .spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 0.4rem;
}

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

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: #777;
    font-size: 0.9rem;
}

.auth-switch a {
    color: #4f6cff;
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.validation-message {
    color: #e50000;
    font-size: 0.8rem;
    margin-top: 0.3rem;
}

/* === 관리자 페이지 === */
.admin-page {
    padding: 7rem 1.5rem 4rem;
    background: #f8f9fc;
    min-height: 100vh;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-header h1 {
    font-size: 1.8rem;
    margin: 0;
    color: #1a1a2e;
}

.btn-admin-add {
    display: inline-block;
    background-color: #4f6cff;
    color: #fff;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.btn-admin-add:hover {
    background-color: #3a54e0;
    color: #fff;
}

.admin-message {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
    border-radius: 8px;
    padding: 0.8rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.admin-table-wrapper {
    overflow-x: auto;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.admin-table thead {
    background: #1a1a2e;
    color: #fff;
}

.admin-table th {
    padding: 0.9rem 1rem;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
}

.admin-table td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid #eee;
    color: #333;
}

.admin-table tbody tr:hover {
    background-color: #f0f4ff;
}

.admin-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.admin-actions form {
    display: inline;
    margin: 0;
}

.btn-admin-edit {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    background-color: #4f6cff;
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    transition: background-color 0.2s;
}

.btn-admin-edit:hover {
    background-color: #3a54e0;
    color: #fff;
}

.btn-admin-delete {
    padding: 0.35rem 0.9rem;
    background-color: #e53935;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-admin-delete:hover {
    background-color: #c62828;
}

.admin-form-card {
    background: #fff;
    border-radius: 16px;
    padding: 2.5rem;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.admin-form-card h1 {
    font-size: 1.5rem;
    margin: 0 0 2rem;
    color: #1a1a2e;
}

.admin-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem 2rem;
}

.admin-form-grid .form-group-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 1.5rem;
}

.admin-form-grid .form-group-checkbox label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: #333;
    cursor: pointer;
}

.admin-form-grid select {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    background: #fff;
}

.admin-form-grid select:focus {
    outline: none;
    border-color: #4f6cff;
    box-shadow: 0 0 0 3px rgba(79, 108, 255, 0.15);
}

.admin-form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    align-items: center;
}

.admin-form-actions .btn-auth,
.admin-form-actions .btn-admin-cancel {
    box-sizing: border-box;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    padding: 0.8rem 2.5rem;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    margin: 0;
}

.admin-form-actions .btn-auth {
    width: auto;
    background-color: #4f6cff;
    color: #fff;
    border-color: #4f6cff;
}

.admin-form-actions .btn-auth:hover {
    background-color: #3a54e0;
    border-color: #3a54e0;
}

.btn-admin-cancel {
    display: inline-block;
    padding: 0.8rem 2.5rem;
    color: #333;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.4;
    background-color: #e9ecef;
    border: 1px solid #ced4da;
    border-radius: 8px;
    transition: background-color 0.2s;
    box-sizing: border-box;
}

.btn-admin-cancel:hover {
    background-color: #dde0e4;
    border-color: #bcc1c6;
    color: #333;
}

/* === 반응형 === */
@media (max-width: 768px) {
    .hero {
        padding: 7rem 1rem 3rem;
    }

    .hero-split {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content {
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-login-card {
        padding: 2rem 1.5rem;
    }

    .page-header {
        padding: 7rem 1rem 3rem;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .auth-page {
        padding: 6rem 1rem 2rem;
    }

    .auth-card {
        padding: 2rem 1.5rem;
    }

    .admin-page {
        padding: 5rem 1rem 2rem;
    }

    .admin-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .admin-form-grid {
        grid-template-columns: 1fr;
    }

    .admin-form-card {
        padding: 1.5rem;
    }
}