/* ============================================================
   NDP Server – Design System
   Dark Emerald Theme – Premium medical imaging platform
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
    --bg-primary: #0c1220;
    --bg-secondary: #141e30;
    --bg-surface: #1a2740;
    --bg-surface-hover: #1f2f4a;
    --bg-card: rgba(20,30,48,0.92);
    --bg-glass: rgba(12,18,32,0.88);
    --bg-hero: linear-gradient(135deg, #0c1220 0%, #0f1a2e 50%, #112240 100%);

    --accent: #10b981;
    --accent-light: #34d399;
    --accent-dark: #059669;
    --accent-gradient: linear-gradient(135deg, #059669, #10b981);
    --accent-gradient-hover: linear-gradient(135deg, #047857, #059669);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: rgba(148,163,184,0.12);
    --border-focus: rgba(16,185,129,0.4);

    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 24px rgba(16,185,129,0.15);

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ---------- Reset & Base ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-light)}
img{max-width:100%;display:block}

::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--bg-primary)}
::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}

/* ---------- Layout ---------- */
.app-container{display:flex;flex-direction:column;min-height:100vh}

/* ---------- Header / Navbar ---------- */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--bg-glass);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--border-color);height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 3rem;transition:all var(--transition-base)}
.navbar.scrolled{box-shadow:var(--shadow-md)}

.nav-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}
.nav-brand .brand-icon{width:36px;height:36px;background:var(--accent-gradient);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}
.nav-brand .brand-icon svg{width:20px;height:20px;fill:white}
.nav-brand h1{font-size:1.1rem;font-weight:700;letter-spacing:-0.02em}
.nav-brand h1 .highlight{color:var(--accent);font-weight:800}

.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{color:var(--text-secondary);font-size:0.9rem;font-weight:500;transition:color var(--transition-fast);text-decoration:none}
.nav-links a:hover,.nav-links a.active{color:var(--text-primary)}
.nav-actions{display:flex;align-items:center;gap:10px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border:none;border-radius:var(--radius-sm);font-family:inherit;font-size:0.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-base);white-space:nowrap;text-decoration:none}
.btn-primary{background:var(--accent-gradient);color:#fff}
.btn-primary:hover{background:var(--accent-gradient-hover);box-shadow:var(--shadow-glow);transform:translateY(-1px)}
.btn-secondary{background:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-color)}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}
.btn-danger{background:rgba(239,68,68,0.1);color:var(--danger);border:1px solid rgba(239,68,68,0.2)}
.btn-danger:hover{background:rgba(239,68,68,0.2)}
.btn-icon{padding:8px;border-radius:var(--radius-sm);background:transparent;border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px}
.btn-icon:hover{color:var(--accent);border-color:var(--accent);background:rgba(16,185,129,0.08)}
.btn-lang{padding:6px 14px;border-radius:20px;background:rgba(16,185,129,0.08);border:1px solid var(--border-color);color:var(--accent);cursor:pointer;transition:all var(--transition-fast);font-family:inherit;font-size:0.8rem;font-weight:500;white-space:nowrap}
.btn-lang:hover{background:rgba(16,185,129,0.15);border-color:var(--accent)}
.btn-sm{padding:6px 14px;font-size:0.8rem}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero{min-height:calc(100vh - 64px);margin-top:64px;background:var(--bg-hero);display:flex;align-items:center;padding:0 3rem;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-30%;right:-10%;width:60%;height:160%;background:radial-gradient(ellipse,rgba(16,185,129,0.06) 0%,transparent 70%);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:50%;height:120%;background:radial-gradient(ellipse,rgba(6,182,212,0.04) 0%,transparent 70%);pointer-events:none}

.hero-inner{max-width:1280px;margin:0 auto;width:100%;display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}

.hero-content{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;background:rgba(16,185,129,0.1);border:1px solid rgba(16,185,129,0.2);border-radius:24px;font-size:0.82rem;font-weight:500;color:var(--accent);margin-bottom:1.5rem;animation:fadeInUp 0.6s ease}
.hero-title{font-size:clamp(2rem,4vw,3.2rem);font-weight:800;line-height:1.2;letter-spacing:-0.03em;margin-bottom:1.25rem;color:var(--text-primary);animation:fadeInUp 0.6s ease 0.1s both}
.hero-desc{font-size:1.05rem;line-height:1.8;color:var(--text-secondary);margin-bottom:2.5rem;max-width:520px;animation:fadeInUp 0.6s ease 0.2s both}

.hero-stats{display:flex;gap:2rem;flex-wrap:wrap;animation:fadeInUp 0.6s ease 0.3s both}
.hero-stat{display:flex;align-items:center;gap:8px}
.hero-stat .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0;box-shadow:0 0 8px rgba(16,185,129,0.4)}
.hero-stat .dot.blue{background:#06b6d4;box-shadow:0 0 8px rgba(6,182,212,0.4)}
.hero-stat span{font-size:0.85rem;color:var(--text-secondary)}
.hero-stat strong{color:var(--text-primary);font-weight:600}

.hero-image{position:relative;z-index:2;animation:fadeInRight 0.8s ease 0.2s both}
.hero-image-wrapper{position:relative;border-radius:var(--radius-xl);overflow:hidden;box-shadow:0 8px 40px rgba(0,0,0,0.5);cursor:pointer;transition:transform var(--transition-base),box-shadow var(--transition-base);border:1px solid rgba(16,185,129,0.15)}
.hero-image-wrapper:hover{transform:translateY(-4px) scale(1.01);box-shadow:0 12px 48px rgba(16,185,129,0.15)}
.hero-image-wrapper img{width:100%;height:auto;min-height:360px;object-fit:cover;display:block}
.hero-image-label{position:absolute;bottom:16px;right:16px;background:rgba(0,0,0,0.7);backdrop-filter:blur(8px);color:#fff;padding:8px 16px;border-radius:var(--radius-sm);font-size:0.8rem;font-weight:500;border:1px solid rgba(16,185,129,0.2)}
.hero-image-placeholder{width:100%;min-height:400px;background:linear-gradient(135deg,#1a2740,#112240);border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:1rem;border:1px solid var(--border-color)}

/* ============================================================
   GALLERY PAGE
   ============================================================ */
.page-content{margin-top:64px;padding:2rem 3rem;max-width:1400px;margin-left:auto;margin-right:auto;width:100%}
.page-header{margin-bottom:2rem}
.page-header h2{font-size:1.5rem;font-weight:700;margin-bottom:0.5rem}
.page-header p{color:var(--text-secondary);font-size:0.95rem}

.toolbar{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}
.search-box{flex:1;min-width:260px;position:relative}
.search-box input{width:100%;padding:10px 16px 10px 42px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-family:inherit;font-size:0.9rem;transition:all var(--transition-fast);outline:none}
.search-box input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(16,185,129,0.1)}
.search-box input::placeholder{color:var(--text-muted)}
.search-box .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:0.9rem;pointer-events:none}

.slides-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.25rem}
.slide-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:all var(--transition-base);cursor:pointer}
.slide-card:hover{border-color:var(--border-focus);box-shadow:var(--shadow-glow);transform:translateY(-3px)}
.slide-card .card-thumbnail{width:100%;height:200px;background:var(--bg-surface);overflow:hidden;position:relative}
.slide-card .card-thumbnail img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}
.slide-card:hover .card-thumbnail img{transform:scale(1.05)}
.card-badge{position:absolute;top:10px;right:10px;background:rgba(16,185,129,0.9);color:#fff;padding:4px 10px;border-radius:20px;font-size:0.72rem;font-weight:600}
.card-body{padding:1rem 1.25rem}
.card-body h3{font-size:0.92rem;font-weight:600;margin-bottom:0.5rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-meta{display:flex;flex-wrap:wrap;gap:0.5rem 1rem;margin-bottom:0.75rem}
.card-meta span{font-size:0.78rem;color:var(--text-secondary);display:flex;align-items:center;gap:4px}
.card-actions{display:flex;justify-content:flex-end;padding-top:0.75rem;border-top:1px solid var(--border-color)}

.empty-state{text-align:center;padding:4rem 2rem;color:var(--text-muted)}
.empty-state .empty-icon{font-size:4rem;margin-bottom:1rem;opacity:0.4}
.empty-state h3{color:var(--text-secondary);margin-bottom:0.5rem}

/* Stats row */
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:2rem}
.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.25rem;display:flex;align-items:center;gap:1rem;transition:all var(--transition-base)}
.stat-card:hover{border-color:var(--border-focus);box-shadow:var(--shadow-glow);transform:translateY(-2px)}
.stat-icon{width:48px;height:48px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.stat-icon.slides{background:rgba(16,185,129,0.1);color:var(--accent)}
.stat-icon.size{background:rgba(6,182,212,0.1);color:#06b6d4}
.stat-icon.annotations{background:rgba(250,204,21,0.1);color:#facc15}
.stat-info h3{font-size:1.5rem;font-weight:700;line-height:1.2}
.stat-info p{font-size:0.78rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.05em}

/* ============================================================
   VIEWER PAGE
   ============================================================ */
.viewer-layout{display:flex;height:calc(100vh - 64px);margin-top:64px;overflow:hidden}
.viewer-main{flex:1;position:relative;background:#080e18}
#osd-viewer{width:100%;height:100%}
.viewer-toolbar{position:absolute;bottom:1.5rem;left:50%;transform:translateX(-50%);background:rgba(10,14,24,0.85);backdrop-filter:blur(16px);border:1px solid rgba(16,185,129,0.15);border-radius:var(--radius-xl);padding:10px 16px;display:flex;align-items:center;gap:8px;z-index:10}
.viewer-toolbar .btn-icon{border:none;background:transparent;color:rgba(255,255,255,0.7);width:52px;height:52px;border-radius:var(--radius-sm);font-size:1.5rem;cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;justify-content:center}
.viewer-toolbar .btn-icon:hover{background:rgba(16,185,129,0.15);color:var(--accent);transform:scale(1.1)}
.toolbar-divider{width:1px;height:32px;background:rgba(16,185,129,0.2);margin:0 6px}

.viewer-sidebar{width:340px;background:var(--bg-secondary);border-left:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden;transition:width var(--transition-base)}
.viewer-sidebar.collapsed{width:0;border:none}
.sidebar-header{padding:1rem 1.25rem;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}
.sidebar-header h2{font-size:0.95rem;font-weight:600}
.sidebar-tabs{display:flex;border-bottom:1px solid var(--border-color)}
.sidebar-tab{flex:1;padding:0.75rem;text-align:center;font-size:0.8rem;font-weight:500;color:var(--text-muted);cursor:pointer;border:none;background:none;transition:all var(--transition-fast);border-bottom:2px solid transparent;font-family:inherit}
.sidebar-tab:hover{color:var(--text-secondary)}
.sidebar-tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.sidebar-content{flex:1;overflow-y:auto;padding:1rem 1.25rem}
.sidebar-panel{display:none}
.sidebar-panel.active{display:block}
.prop-list{list-style:none}
.prop-list li{display:flex;justify-content:space-between;padding:0.5rem 0;border-bottom:1px solid var(--border-color);font-size:0.82rem}
.prop-list li:last-child{border-bottom:none}
.prop-label{color:var(--text-secondary)}
.prop-value{color:var(--text-primary);font-weight:500;text-align:right;max-width:55%;word-break:break-all}
.navigator-container{margin-bottom:1rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);overflow:hidden;background:#000}
.notes-area{width:100%;min-height:120px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-family:inherit;font-size:0.85rem;padding:0.75rem;resize:vertical;outline:none}
.notes-area:focus{border-color:var(--accent)}

/* ============================================================
   ADMIN PAGE
   ============================================================ */
.admin-tabs{display:flex;gap:0;border-bottom:2px solid var(--border-color);margin-bottom:2rem}
.admin-tab{padding:0.85rem 1.5rem;font-size:0.9rem;font-weight:500;color:var(--text-muted);cursor:pointer;border:none;background:none;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all var(--transition-fast);font-family:inherit}
.admin-tab:hover{color:var(--text-secondary)}
.admin-tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.admin-table-wrap{overflow-x:auto}
.admin-table{width:100%;border-collapse:collapse;font-size:0.85rem}
.admin-table th{text-align:left;padding:0.75rem 1rem;background:var(--bg-surface);color:var(--text-secondary);font-weight:600;border-bottom:1px solid var(--border-color);white-space:nowrap}
.admin-table td{padding:0.75rem 1rem;border-bottom:1px solid var(--border-color)}
.admin-table tr:hover td{background:var(--bg-surface-hover)}

/* Settings form */
.settings-form{max-width:700px}
.form-group{margin-bottom:1.25rem}
.form-group label{display:block;font-size:0.85rem;font-weight:600;color:var(--text-primary);margin-bottom:0.4rem}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-family:inherit;font-size:0.9rem;outline:none;transition:border-color var(--transition-fast)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(16,185,129,0.08)}
.form-group small{display:block;margin-top:0.3rem;font-size:0.78rem;color:var(--text-muted)}

/* Upload zone */
.upload-zone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:3rem 2rem;text-align:center;margin-bottom:2rem;transition:all var(--transition-base);cursor:pointer;display:none}
.upload-zone.visible{display:block}
.upload-zone.drag-over{border-color:var(--accent);background:rgba(16,185,129,0.04)}
.upload-zone .upload-icon{font-size:3rem;margin-bottom:1rem;opacity:0.5}
.upload-zone p{color:var(--text-secondary);margin-bottom:0.5rem}

.upload-progress{display:none;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1rem 1.25rem;margin-bottom:1.5rem}
.upload-progress.active{display:block}
.progress-bar-container{height:6px;background:var(--bg-primary);border-radius:3px;overflow:hidden;margin-top:0.75rem}
.progress-bar{height:100%;background:var(--accent-gradient);border-radius:3px;width:0%;transition:width var(--transition-fast)}

/* Badge */
.badge{display:inline-flex;padding:3px 10px;border-radius:12px;font-size:0.72rem;font-weight:600}
.badge-admin{background:rgba(16,185,129,0.12);color:var(--accent)}
.badge-active{background:rgba(34,197,94,0.12);color:var(--success)}
.badge-inactive{background:rgba(239,68,68,0.12);color:var(--danger)}

/* ============================================================
   LOGIN PAGE
   ============================================================ */
.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-hero);padding:2rem;position:relative;overflow:hidden}
.login-container::before{content:'';position:absolute;top:-20%;right:-20%;width:60%;height:140%;background:radial-gradient(ellipse,rgba(16,185,129,0.06),transparent 70%);pointer-events:none}
.login-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:2.5rem;max-width:420px;width:100%;box-shadow:var(--shadow-lg);position:relative;z-index:1}
.login-card .login-logo{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:2rem}
.login-card .login-logo .brand-icon{width:42px;height:42px;background:var(--accent-gradient);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}
.login-card .login-logo .brand-icon svg{width:24px;height:24px;fill:white}
.login-card .login-logo h2{font-size:1.2rem;font-weight:700}
.login-card .login-logo h2 .highlight{color:var(--accent)}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.6);backdrop-filter:blur(4px);z-index:1000;align-items:center;justify-content:center}
.modal-overlay.active{display:flex;animation:fadeIn var(--transition-base) ease}
.modal{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:2rem;max-width:520px;width:90%;animation:slideUp var(--transition-base) ease}
.modal h2{margin-bottom:1rem;font-size:1.15rem}
.modal-actions{display:flex;gap:0.75rem;justify-content:flex-end;margin-top:1.5rem}

/* ============================================================
   TOAST
   ============================================================ */
.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:2000;display:flex;flex-direction:column;gap:0.5rem}
.toast{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:0.85rem 1.25rem;font-size:0.875rem;box-shadow:var(--shadow-lg);animation:slideInRight var(--transition-base) ease;display:flex;align-items:center;gap:8px;min-width:280px}
.toast.success{border-left:3px solid var(--success)}
.toast.error{border-left:3px solid var(--danger)}
.toast.info{border-left:3px solid var(--accent)}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:2rem 3rem;text-align:center;color:var(--text-muted);font-size:0.82rem}
.site-footer a{color:var(--accent)}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInRight{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:1024px){
    .hero-inner{grid-template-columns:1fr;gap:2rem;text-align:center}
    .hero-desc{margin-left:auto;margin-right:auto}
    .hero-stats{justify-content:center}
    .hero-image-wrapper img{min-height:280px}
}
@media(max-width:768px){
    .navbar{padding:0 1rem}
    .nav-links{display:none}
    .hero{padding:0 1.5rem}
    .page-content{padding:1.5rem 1rem}
    .slides-grid{grid-template-columns:1fr}
    .viewer-sidebar{width:100%;position:absolute;right:0;z-index:20;height:100%}
    .viewer-sidebar.collapsed{width:0}
    .stats-row{grid-template-columns:1fr 1fr}
}