/* =========================================================
   SMART BUILDER - LIGHT MODE & GLASSY UI
   Theme: Professional / YouTube Studio Style
   Updated: 2026-01-13
   ========================================================= */

:root {
    /* --- LIGHT THEME PALETTE --- */
    --b-bg-main: #f8fafc;       /* Main Canvas Background */
    --b-bg-sidebar: #ffffff;    /* Sidebar Background */
    --b-bg-card: #ffffff;       /* Card/Panel Background */
    
    --b-text-main: #0f172a;     /* Darkest Text */
    --b-text-muted: #64748b;    /* Muted Text */
    --b-border: #e2e8f0;        /* Light Border */
    
    --b-primary: #3b82f6;       /* Brand Blue */
    --b-primary-light: rgba(59, 130, 246, 0.08); /* Glassy Blue Background */
    --b-primary-hover: #2563eb;
    
    --b-danger: #ef4444;
    --b-success: #10b981;
    
    --b-sidebar-width: 280px;
    --radius-md: 12px;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.03);
}

/* Base Reset */
html, body { 
    margin: 0; padding: 0; height: 100%; 
    font-family: 'Inter', system-ui, -apple-system, sans-serif; 
    background: var(--b-bg-main); 
    color: var(--b-text-main); 
}
* { box-sizing: border-box; }

/* Wrapper */
.sbp-builder-wrapper { display: flex; height: 100vh; overflow: hidden; background: var(--b-bg-main); }

/* =========================================================
   1. GLASSY SIDEBAR STYLING
   ========================================================= */
.sbp-b-sidebar { 
    width: var(--b-sidebar-width); 
    background: var(--b-bg-sidebar); 
    border-right: 1px solid var(--b-border); 
    flex-shrink: 0; 
    display: flex; flex-direction: column; 
    z-index: 20;
    box-shadow: 2px 0 10px rgba(0,0,0,0.02);
}

/* Logo Area */
.b-logo { 
    height: 70px; display: flex; align-items: center; padding: 0 24px; 
    font-weight: 800; font-size: 1.2rem; gap: 12px; 
    color: var(--b-text-main); border-bottom: 1px solid var(--b-border); 
    letter-spacing: -0.5px;
}
.b-logo i { color: var(--b-primary); font-size: 1.4rem; }

/* Navigation Area */
.b-nav { flex: 1; padding: 20px 15px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }

/* --- GLASSY NAV ITEMS (The "Lighting" Effect) --- */
.b-nav-item { 
    display: flex; align-items: center; gap: 15px; 
    padding: 14px 20px; 
    color: var(--b-text-muted); 
    text-decoration: none; 
    font-size: 0.95rem; font-weight: 600; 
    border-radius: var(--radius-md); 
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

/* Hover State */
.b-nav-item:hover { 
    background: #f1f5f9; 
    color: var(--b-text-main); 
    transform: translateX(3px);
}

/* Active State (Glassy Blue) */
.b-nav-item.active { 
    background: var(--b-primary-light); /* Light Blue Glass */
    color: var(--b-primary); 
    border-color: rgba(59, 130, 246, 0.2);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

/* Icon Glow */
.b-nav-item i { 
    width: 24px; text-align: center; font-size: 1.1rem; transition: 0.2s; 
}
.b-nav-item.active i { 
    text-shadow: 0 0 10px rgba(59, 130, 246, 0.4); /* Lighting Icon */
}

/* Footer (Back Link) */
.b-footer { padding: 20px; border-top: 1px solid var(--b-border); background: #f8fafc; }
.b-back-link { 
    color: var(--b-text-muted); text-decoration: none; display: flex; align-items: center; 
    gap: 10px; font-size: 0.9rem; font-weight: 600; padding: 10px; border-radius: 8px;
    transition: 0.2s;
}
.b-back-link:hover { background: #e2e8f0; color: var(--b-text-main); }


/* =========================================================
   2. MAIN CONTENT AREA
   ========================================================= */
.sbp-b-main { flex: 1; display: flex; flex-direction: column; position: relative; background: var(--b-bg-main); }

/* Header */
.sbp-b-header { 
    height: 70px; background: rgba(255, 255, 255, 0.8); 
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--b-border); 
    display: flex; align-items: center; justify-content: space-between; 
    padding: 0 32px; flex-shrink: 0; z-index: 10;
}

.header-left h1 { font-size: 1.35rem; margin: 0; font-weight: 700; color: var(--b-text-main); letter-spacing: -0.5px; }

/* Status Badges */
.status-badge { display: inline-flex; align-items: center; gap: 5px; padding: 4px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; margin-left: 15px; vertical-align: middle; border: 1px solid transparent; }
.status-badge.draft { background: #f1f5f9; color: #64748b; border-color: #e2e8f0; }
.status-badge.published { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
.status-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* Buttons (Modern) */
.btn-primary { 
    background: linear-gradient(135deg, var(--b-primary), var(--b-primary-hover)); 
    color: white; border: none; padding: 10px 24px; border-radius: 8px; 
    font-weight: 600; cursor: pointer; transition: 0.2s; font-size: 0.9rem; 
    display: inline-flex; align-items: center; gap: 8px; 
    box-shadow: 0 4px 6px rgba(59, 130, 246, 0.2);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 12px rgba(59, 130, 246, 0.3); }

.btn-secondary { 
    background: #ffffff; border: 1px solid var(--b-border); color: var(--b-text-muted); 
    padding: 10px 20px; border-radius: 8px; font-weight: 600; cursor: pointer; 
    margin-right: 10px; transition: 0.2s; 
}
.btn-secondary:hover { background: #f8fafc; color: var(--b-text-main); border-color: #cbd5e1; }


/* =========================================================
   3. CONTENT & FORMS
   ========================================================= */
.sbp-b-content { flex: 1; padding: 40px; overflow-y: auto; }
.b-container-small { max-width: 900px; margin: 0 auto; }
.b-tab-content { display: none; animation: fadeIn 0.3s ease-out; }
.b-tab-content.active { display: block; }

/* Cards */
.b-card { 
    background: var(--b-bg-card); 
    border: 1px solid var(--b-border); border-radius: 16px; 
    margin-bottom: 24px; box-shadow: var(--shadow-soft); 
}
.b-card-header { padding: 25px 30px; border-bottom: 1px solid var(--b-border); }
.b-card-header h3 { margin: 0 0 5px 0; font-size: 1.15rem; font-weight: 700; color: var(--b-text-main); }
.b-card-header p { margin: 0; color: var(--b-text-muted); font-size: 0.9rem; }
.b-card-body { padding: 30px; }

/* Inputs */
.form-group { margin-bottom: 24px; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 8px; color: var(--b-text-main); }
.form-group label .req { color: var(--b-danger); margin-left: 3px; }

.b-input { 
    width: 100%; padding: 12px 16px; 
    background: #ffffff; border: 1px solid var(--b-border); 
    border-radius: 8px; font-size: 0.95rem; 
    transition: 0.2s; color: var(--b-text-main);
}
.b-input:focus { 
    outline: none; border-color: var(--b-primary); 
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1); 
    background: #fff;
}
.hint { font-size: 0.85rem; color: var(--b-text-muted); margin-top: 6px; display: block; }

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

/* =========================================================
   4. CURRICULUM SPLIT LAYOUT
   ========================================================= */
.sbp-split-wrapper {
    display: flex; height: calc(100vh - 70px); 
    margin: -40px; /* Counteract padding */
    background: #fff;
}

/* Left Sidebar (Tree) */
.sbp-curr-sidebar {
    width: 340px; background: #fff; border-right: 1px solid var(--b-border);
    display: flex; flex-direction: column; z-index: 10;
}
.curr-sidebar-header {
    padding: 20px; border-bottom: 1px solid var(--b-border);
    background: #f8fafc; display: flex; justify-content: space-between; align-items: center;
}
.curr-tree-list { flex: 1; overflow-y: auto; padding: 20px; background: #ffffff; }

/* Tree Items */
.tree-section { 
    border: 1px solid var(--b-border); border-radius: 8px; overflow: hidden; margin-bottom: 15px; 
    transition: 0.2s;
}
.tree-section:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.05); border-color: #cbd5e1; }

.tree-section-head {
    padding: 12px 16px; background: #f8fafc; cursor: pointer; 
    font-weight: 700; color: var(--b-text-main); border-bottom: 1px solid var(--b-border);
    display: flex; justify-content: space-between; align-items: center;
}

.tree-lesson-item {
    padding: 10px 16px 10px 30px; display: flex; align-items: center; gap: 10px;
    cursor: pointer; border-bottom: 1px solid #f1f5f9; color: var(--b-text-muted);
    transition: 0.2s; font-size: 0.9rem;
}
.tree-lesson-item:hover { background: #f0f9ff; color: var(--b-primary); }
.tree-lesson-item.active { 
    background: #eff6ff; color: var(--b-primary); 
    border-right: 3px solid var(--b-primary); font-weight: 600; 
}

/* Right Stage (Editor) */
.sbp-curr-stage { 
    flex: 1; background: #f1f5f9; overflow-y: auto; padding: 40px; 
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}

.editor-container { 
    background: #fff; padding: 40px; border-radius: 16px; 
    box-shadow: 0 10px 25px rgba(0,0,0,0.05); border: 1px solid var(--b-border); 
}

/* =========================================================
   5. UTILS
   ========================================================= */
#wpadminbar { display: none !important; }
html { margin-top: 0 !important; }

/* =========================================================
   MODERN COLLAPSIBLE SIDEBAR & CONTENT EXPANSION
   ========================================================= */

/* 1. Sidebar Animation & sizing */
.sb-sidebar {
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    /* Sidebar එකේ පළල වෙනස්වීම Smooth කරන්න */
}

.sb-main-area {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    /* Content එකේ ඉඩ වෙනස්වීම Smooth කරන්න */
    width: 100%; /* Flexbox නිසා මෙය ස්වයංක්‍රීයව ඉඩ පුරවයි */
}

/* =========================================================
   COLLAPSED STATE STYLES (Modern Dock Look)
   ========================================================= */

/* A. Sidebar Width Shrink */
body.sb-collapsed .sb-sidebar {
    width: 80px; 
    min-width: 80px;
}

/* B. Hide Unwanted Elements */
body.sb-collapsed .sb-sidebar-logo span,
body.sb-collapsed .sb-nav-section label,
body.sb-collapsed .sb-box-item span,
body.sb-collapsed .sb-logout-btn span,
body.sb-collapsed .sb-version-tag,
body.sb-collapsed .selector-arrow,
body.sb-collapsed .sb-page-select {
    display: none !important;
}

/* C. Navigation Adjustment */
body.sb-collapsed .sb-nav-section {
    padding: 10px 0;
    text-align: center;
}

/* Grid ඉවත් කර තනි පේළියට (Column) ගැනීම */
body.sb-collapsed .sb-grid-2,
body.sb-collapsed .sb-grid-3 {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

/* D. MODERN ICON STYLING (The "Pro" Look) */
body.sb-collapsed .sb-box-item {
    width: 50px;
    height: 50px;
    padding: 0;
    margin: 0 auto;
    border-radius: 12px;
    
    /* Default State: Clean & Minimal */
    background: transparent !important; /* වර්ණවත් පසුබිම ඉවත් කරයි */
    box-shadow: none !important;
    border: 1px solid transparent;
    color: #64748b; /* අයිකන වර්ණය (Gray) */
    
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative; /* Tooltip සඳහා */
}

/* Icon Size Adjustment */
body.sb-collapsed .sb-box-item i {
    font-size: 1.4rem;
    margin: 0;
    color: inherit;
}

/* E. HOVER EFFECT (Show Color & Tooltip) */
body.sb-collapsed .sb-box-item:hover,
body.sb-collapsed .sb-box-item.active {
    background: #f1f5f9 !important; /* ලා අළු පාට පසුබිමක් */
    color: var(--sb-brand); /* Brand Color */
    transform: scale(1.05); /* පොඩි zoom එකක් */
    box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
}

/* විශේෂ වර්ණ - Active/Hover වූ විට පමණක් පෙන්වන්න */
body.sb-collapsed .sb-box-item[data-tab="products"]:hover, body.sb-collapsed .sb-box-item[data-tab="products"].active { color: #2563eb; background: #eff6ff !important; }
body.sb-collapsed .sb-box-item[data-tab="classes"]:hover, body.sb-collapsed .sb-box-item[data-tab="classes"].active { color: #7c3aed; background: #f5f3ff !important; }
body.sb-collapsed .sb-box-item[data-tab="orders"]:hover, body.sb-collapsed .sb-box-item[data-tab="orders"].active { color: #059669; background: #ecfdf5 !important; }
body.sb-collapsed .sb-box-item[data-tab="wallet"]:hover, body.sb-collapsed .sb-box-item[data-tab="wallet"].active { color: #d97706; background: #fffbeb !important; }

/* F. CSS TOOLTIP (Hover කළ විට නම පෙන්වීම) */
/* මෙය ඉතා වැදගත්! නම සැඟවී ඇති නිසා Hover කළ විට එය Sidebar එකෙන් එළියට පෙන්වයි */
body.sb-collapsed .sb-box-item:hover::after {
    content: attr(data-tooltip); /* PHP එකේ data-tooltip attribute එක තිබිය යුතුය */
    position: absolute;
    left: 65px; /* Sidebar එකෙන් එළියට */
    top: 50%;
    transform: translateY(-50%);
    
    background: #1e293b; /* Dark Tooltip */
    color: #fff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    z-index: 9999;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    
    /* Animation */
    opacity: 0;
    animation: fadeInTooltip 0.2s forwards;
}

/* Tooltip Arrow */
body.sb-collapsed .sb-box-item:hover::before {
    content: '';
    position: absolute;
    left: 60px;
    top: 50%;
    transform: translateY(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: transparent #1e293b transparent transparent;
    opacity: 0;
    animation: fadeInTooltip 0.2s forwards;
}

@keyframes fadeInTooltip {
    to { opacity: 1; }
}

/* G. Header Adjustment */
body.sb-collapsed .sb-sidebar-top {
    flex-direction: column;
    padding: 15px 0;
    gap: 15px;
}
body.sb-collapsed .sb-sidebar-logo img {
    width: 40px; height: 40px; margin: 0;
}
body.sb-collapsed .sb-toggle-btn {
    transform: rotate(180deg);
}