/* Google Modern Dark Mode + Dynamic 3D Glassmorphism - style.css */
:root {
    --bg-dark: #07090e;
    --glass-bg: rgba(255, 255, 255, 0.05);
    /* Lighter for better glass feel */
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-highlight: rgba(255, 255, 255, 0.2);
    --primary-accent: #38bdf8;
    --secondary-accent: #818cf8;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --btn-primary: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
    --error-accent: #ef4444;
    --success-accent: #10b981;
    --card-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.7);
    /* Deeper shadow */
    --glow-shadow: 0 0 30px rgba(56, 189, 248, 0.3);
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    margin: 0;
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
    position: relative;
    background: radial-gradient(circle at 50% 50%, #111827 0%, #07090e 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 20px;
}

/* Auth Pages Specific Centering */
body.auth-page {
    justify-content: center;
}

body.auth-page .footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: transparent;
    pointer-events: none;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

/* Dynamic Moving Background Blobs */
body::before,
body::after {
    content: '';
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.15;
    pointer-events: none;
    animation: move-blobs 20s infinite alternate;
}

body::before {
    background: var(--primary-accent);
    top: -100px;
    left: -100px;
}

body::after {
    background: var(--secondary-accent);
    bottom: -100px;
    right: -100px;
    animation-delay: -10s;
}

@keyframes move-blobs {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(300px, 200px) scale(1.2);
    }
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 40px auto;
    background: var(--glass-bg);
    backdrop-filter: blur(40px) saturate(200%);
    /* Stronger blur */
    -webkit-backdrop-filter: blur(40px) saturate(200%);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 40px;
    box-shadow:
        inset 0 1px 1px var(--glass-highlight),
        var(--card-shadow);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

@media (max-width: 900px) {
    .header-actions {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    body {
        justify-content: center;
        padding: 10px;
    }

    .container {
        padding: 30px 20px;
        border-radius: 20px;
        width: 100%;
        margin: 10px 0;
    }

    .view-badge {
        display: none !important;
    }

    .category-select {
        display: none !important;
    }
}

.nav-menu {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: nowrap;
}

.nav-menu .btn,
.nav-menu .btn-link {
    width: auto;
    white-space: nowrap;
    padding: 10px 24px;
    font-size: 14px;
}

.btn-logout {
    background: var(--error-accent) !important;
    box-shadow: 0 10px 20px -5px rgba(239, 68, 68, 0.3) !important;
}

.btn-logout:hover {
    box-shadow: 0 15px 30px -5px rgba(239, 68, 68, 0.4) !important;
}

@media (max-width: 600px) {
    .nav-menu {
        gap: 6px;
        width: 100%;
        justify-content: space-between;
    }

    .nav-menu .btn,
    .nav-menu .btn-link {
        padding: 8px 12px;
        font-size: 11px;
        border-radius: 10px;
    }
}

/* Custom File Input UI */
.file-upload-block {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 100%;
}

.file-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 8px 12px;
    gap: 10px;
    cursor: pointer;
    transition: all 0.3s;
    overflow: hidden;
    max-width: 100%;
}

.file-input-wrapper:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-accent);
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    left: 0;
    top: 0;
}

.file-btn-mock {
    background: var(--btn-primary);
    color: white;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    white-space: nowrap;
}

.file-status-text {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.media-upload-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    width: 100%;
}

@media (max-width: 480px) {
    .media-upload-grid {
        grid-template-columns: 1fr;
    }
}

/* Glass Highlight Effect */
.container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    z-index: 1;
}

h1 {
    font-size: 32px;
    font-weight: 900;
    text-align: center;
    margin-bottom: 40px;
    background: var(--btn-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
    filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.3));
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0.8;
}

.action-btn:hover {
    opacity: 1;
    transform: scale(1.2);
}

.comment-badge,
.view-badge {
    position: absolute;
    top: 25px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

.comment-badge {
    right: 25px;
    color: var(--primary-accent);
}

.view-badge.rank-highlight {
    border-color: rgba(251, 191, 36, 0.5);
    /* Gold border for top 10 */
    background: rgba(251, 191, 36, 0.1);
}

.rank-tag {
    margin-left: 8px;
    padding: 2px 8px;
    background: #fbbf24;
    /* Gold color */
    color: #000;
    border-radius: 6px;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: -0.2px;
}

.view-badge {
    right: 85px;
    /* Adjust based on comment badge width */
    color: var(--secondary-accent);
}

.trend-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
}

.trend-tag:hover {
    background: rgba(56, 189, 248, 0.08);
    border-color: rgba(56, 189, 248, 0.4);
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3);
}

.trend-rank {
    font-size: 12px;
    font-weight: 900;
    color: var(--primary-accent);
    background: rgba(56, 189, 248, 0.1);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-right: 2px;
}

/* Rank 1 Special Styling */
.trend-tag:first-of-type {
    border-color: rgba(251, 191, 36, 0.3);
    background: rgba(251, 191, 36, 0.05);
}

.trend-tag:first-of-type .trend-rank {
    background: #fbbf24;
    color: #000;
}

.trend-tag:first-of-type:hover {
    background: rgba(251, 191, 36, 0.1);
    border-color: #fbbf24;
}

.comment-badge svg,
.view-badge svg {
    opacity: 0.8;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 16px 20px;
    border-radius: 14px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-accent);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.2);
    transform: translateY(-2px);
}

select option {
    background-color: #0f172a;
    color: white;
}

.btn {
    width: 100%;
    padding: 18px;
    border-radius: 14px;
    border: none;
    background: var(--btn-primary);
    color: white;
    font-size: 18px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 10px 20px -5px rgba(56, 189, 248, 0.4);
    text-decoration: none !important;
    display: inline-block;
    text-align: center;
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 20px 30px -5px rgba(56, 189, 248, 0.5);
    filter: brightness(1.1);
}

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

.btn-link {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary) !important;
    text-decoration: none !important;
    font-weight: 700;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
}

.btn-link:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.3);
}

.alert {
    padding: 18px;
    border-radius: 16px;
    margin-bottom: 30px;
    font-size: 15px;
    border-left: 5px solid;
    backdrop-filter: blur(10px);
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border-color: var(--error-accent);
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    color: #6ee7b7;
    border-color: var(--success-accent);
}

/* List & Grid - Dynamic 3D */
.ios-list {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.ios-list-item {
    padding: 20px 28px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.ios-list-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.ios-list-item:last-child {
    border-bottom: none;
}

.badge {
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.badge-cat {
    background: rgba(56, 189, 248, 0.15);
    color: var(--primary-accent);
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-sym {
    background: rgba(129, 140, 248, 0.15);
    color: var(--secondary-accent);
    border: 1px solid rgba(129, 140, 248, 0.3);
}

/* Dashboard Grid & Pagination */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

@media (max-width: 992px) {
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
}

.pg-btn {
    padding: 10px 18px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
}

.pg-btn:hover:not(.disabled) {
    background: var(--btn-primary);
    color: white;
    transform: translateY(-2px);
}

.pg-btn.active {
    background: var(--btn-primary);
    color: white;
    border-color: var(--primary-accent);
}

.pg-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Dashboard Cards - Ultra 3D */
.solution-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 30px;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.1),
        0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%, rgba(255, 255, 255, 0.05) 100%);
    pointer-events: none;
}

.solution-card:hover {
    transform: translateY(-12px) scale(1.03);
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.2),
        0 40px 80px -15px rgba(0, 0, 0, 0.8);
}

.solution-title {
    font-size: 24px;
    font-weight: 800;
    margin: 15px 0 10px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.solution-meta {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    gap: 15px;
    align-items: center;
}

/* Individual Content Styling */
.summary-text {
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Step UI - Glass Panels */
.step-box {
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 40px;
    margin-bottom: 35px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.05),
        0 20px 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease;
}

.step-box:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.05);
}

.step-num {
    font-size: 20px;
    font-weight: 900;
    margin-bottom: 25px;
    display: block;
    padding: 12px 25px;
    background: var(--btn-primary);
    border-radius: 14px;
    color: #ffffff !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.footer {
    text-align: center;
    padding: 60px 20px;
    font-weight: 600;
    letter-spacing: 1px;
    opacity: 0.6;
    transition: opacity 0.3s;
}

.footer-text {
    color: var(--text-secondary);
    transition: color 0.3s, background 0.3s, background-clip 0.3s;
}

.footer:hover {
    opacity: 1;
}

.footer:hover .footer-text {
    background: linear-gradient(90deg,
            var(--text-secondary) 0%,
            var(--primary-accent) 25%,
            #7dd3fc 50%,
            var(--primary-accent) 75%,
            var(--text-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.auto-link {
    color: var(--primary-accent);
    text-decoration: underline;
    text-underline-offset: 4px;
    font-weight: 600;
    transition: color 0.3s;
}

.auto-link:hover {
    color: var(--secondary-accent);
}

/* Floating TOP Button */
.top-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 56px;
    height: 56px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--primary-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow:
        inset 0 1px 1px var(--glass-highlight),
        0 15px 35px rgba(0, 0, 0, 0.4);
}

.top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.top-btn:hover {
    background: var(--btn-primary);
    color: #fff;
    transform: scale(1.1) translateY(-5px);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 20px 40px rgba(56, 189, 248, 0.4);
}

@media (max-width: 768px) {
    .top-btn {
        bottom: 25px;
        right: 25px;
        width: 48px;
        height: 48px;
    }
}

/* Print Styles */
@media print {
    body {
        background: #fff !important;
        color: #000 !important;
        padding: 0 !important;
    }

    .container {
        width: 100% !important;
        max-width: none !important;
        margin: 0 !important;
        background: none !important;
        box-shadow: none !important;
        border: none !important;
        backdrop-filter: none !important;
        padding: 0 !important;
    }

    .no-print,
    .btn,
    .btn-link,
    .header-actions,
    .pagination-container,
    .comment-section,
    #bg-canvas,
    .logo-wrapper,
    .footer,
    .step-video-container,
    .trending-wrapper,
    .search-form-container {
        display: none !important;
    }

    .solution-list,
    .solutions-grid {
        display: block !important;
    }

    .solution-card {
        background: #fff !important;
        border: 1px solid #000 !important;
        color: #000 !important;
        margin-bottom: 20px !important;
        break-inside: avoid;
        box-shadow: none !important;
        padding: 20px !important;
    }

    .solution-header {
        border-bottom: 2px solid #000 !important;
        padding-bottom: 20px !important;
        margin-bottom: 30px !important;
    }

    .step-box {
        background: #fff !important;
        border: 1px solid #000 !important;
        box-shadow: none !important;
        break-inside: avoid;
        margin-bottom: 20px !important;
        color: #000 !important;
        padding: 20px !important;
        border-radius: 0 !important;
    }

    .step-desc,
    .guide-text,
    .summary-text,
    p,
    li,
    td,
    th {
        color: #000 !important;
        font-size: 14px !important;
    }

    .step-img {
        max-height: 400px !important;
        border: 1px solid #000 !important;
        margin-top: 10px !important;
    }

    .solution-title,
    .guide-title,
    h1,
    h2,
    h3 {
        color: #000 !important;
        font-size: 20pt !important;
        text-shadow: none !important;
        background: none !important;
        -webkit-text-fill-color: initial !important;
        margin-top: 10px !important;
    }

    .badge {
        border: 1px solid #000 !important;
        color: #000 !important;
        background: none !important;
        padding: 2px 8px !important;
        text-transform: none !important;
    }

    .step-num,
    .step-label {
        color: #000 !important;
        background: #eee !important;
        border: 1px solid #000 !important;
        text-shadow: none !important;
        box-shadow: none !important;
        font-size: 12pt !important;
        padding: 5px 15px !important;
        margin-bottom: 15px !important;
        display: inline-block !important;
    }
}

/* ========== 공통 프리로더 (배터리 충전형) ========== */
.preloader-overlay {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader-overlay.preloader-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-battery-wrap {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 20px;
}

.preloader-battery-track {
    width: 280px;
    height: 56px;
    border-radius: 14px;
    border: 2px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.5);
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

.preloader-battery-fill {
    height: 100%;
    width: 0;
    border-radius: 12px;
    animation: preloader-charge 1.8s linear infinite;
    position: relative;
    overflow: hidden;
}

.preloader-battery-stripes {
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(105deg,
            var(--primary-accent) 0px,
            var(--primary-accent) 6px,
            rgba(56, 189, 248, 0.85) 6px,
            rgba(56, 189, 248, 0.85) 12px);
    background-size: 24px 100%;
    border-radius: 12px;
}

.preloader-battery-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.2) 0%,
            transparent 50%,
            rgba(0, 0, 0, 0.15) 100%);
    border-radius: 12px;
}

.preloader-battery-cap {
    width: 8px;
    height: 28px;
    background: var(--glass-border);
    border-radius: 0 4px 4px 0;
    margin-left: -2px;
    box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
}

@keyframes preloader-charge {
    0% {
        width: 0;
    }

    45% {
        width: 92%;
    }

    55% {
        width: 92%;
    }

    100% {
        width: 0;
    }
}

.preloader-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}