/* =========================================================================
   SEC CSE 19 — SYSTEM MAIN RESPONSIVE CORE STYLESHEET
   Design Pattern: Premium Glassmorphism & High-Contrast Visual Matrix
   ========================================================================= */

/* --- SYSTEM DESIGN CONSTANTS --- */
:root {
  --bg-dark: #090d16;
  --bg-gradient-fallback: #0f172a;
  --glass-bg: rgba(15, 23, 42, 0.65);
  --glass-bg-hover: rgba(30, 41, 59, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-glow: rgba(56, 189, 248, 0.25);
  
  --primary: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.15);
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.2);
  --danger: #f43f5e;
  --success: #10b981;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dark: #0f172a;
  
  --sidebar-width: 280px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- RESETS & APPARATUS CONFIGURATION --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Plus Jakarta Sans', sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* --- ANIMATED AMBIENT BACKGROUND SYSTEM --- */
.gradient-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: -1;
  background: var(--bg-gradient-fallback);
  overflow: hidden;
}
.gradient-bg div {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
}
.g1 { top: 10%; left: 15%; width: 450px; height: 450px; background: var(--accent); }
.g2 { bottom: 15%; right: 10%; width: 500px; height: 500px; background: var(--primary); }
.g3 { top: 50%; left: 50%; transform: translate(-50%, -50%); width: 350px; height: 350px; background: var(--danger); }

/* --- CORE UI LAYOUT UTILITIES --- */
.hidden { display: none !important; }
.subtitle-caption { color: var(--text-muted); font-size: 0.9rem; line-height: 1.5; margin-top: 4px; }
.mt-15 { margin-top: 15px !important; }
.mb-20 { margin-bottom: 20px !important; }

/* --- BUTTON MECHANICS --- */
button, .btn-ux-primary, .btn-ux-accent, .btn-ux-secondary {
  cursor: pointer;
  border: none;
  outline: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 10px;
  transition: var(--transition-smooth);
}
.btn-ux-primary { background: var(--primary); color: var(--text-dark); padding: 12px 22px; }
.btn-ux-primary:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 0 15px var(--primary-glow); }
.btn-ux-accent { background: var(--accent); color: #fff; padding: 12px 22px; }
.btn-ux-accent:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 0 15px var(--accent-glow); }
.btn-ux-secondary { background: rgba(255, 255, 255, 0.06); color: var(--text-main); border: 1px solid var(--glass-border); padding: 10px 18px; }
.btn-ux-secondary:hover { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.2); }

/* --- DYNAMIC TOAST NOTIFICATION LAYER --- */
.toast {
  position: fixed;
  top: 24px; right: 24px;
  z-index: 9999;
  animation: slideInRight 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.toast-content {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--accent);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 10px var(--accent-glow);
  backdrop-filter: blur(12px);
  padding: 16px 24px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.animate-pulse { animation: pulse 2s infinite; }

/* =========================================================================
   GATEWAY IDENTITY INTERFACE (AUTHENTICATION LAYER)
   ========================================================================= */
.auth-wrapper {
  display: flex; justify-content: center; align-items: center;
  height: 100vh; width: 100vw; padding: 20px;
}
.auth-glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 40px;
  width: 100%; max-width: 440px;
  text-align: center;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.7);
}
.logo-box svg { width: 90px; height: 90px; margin-bottom: 15px; }
.school-tag { color: var(--primary); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 30px; }
.auth-instruction { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 25px; line-height: 1.5; }

.login-btn-google {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  width: 100%; padding: 14px; border-radius: 12px;
  background: #ffffff; color: #0f172a; font-size: 1rem; font-weight: 700;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.login-btn-google:hover { background: #f1f5f9; transform: translateY(-1px); }
.login-btn-google img { width: 22px; height: 22px; }

.action-submit-btn {
  width: 100%; padding: 14px; background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; font-size: 1rem; border-radius: 12px; box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.action-submit-btn:hover { opacity: 0.95; transform: translateY(-1px); }

/* --- INTERACTIVE CONTROL FIELDS --- */
.interactive-field { margin-bottom: 22px; text-align: left; }
.interactive-field label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-muted); margin-bottom: 8px; }
.input-wrapper {
  display: flex; align-items: center; background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border); border-radius: 10px; padding: 12px 16px;
  transition: var(--transition-smooth);
}
.input-wrapper:focus-within { border-color: var(--primary); box-shadow: 0 0 10px var(--primary-glow); }
.input-wrapper i { color: var(--primary); margin-right: 12px; font-size: 1.05rem; }
.input-wrapper input { background: transparent; border: none; color: #fff; width: 100%; outline: none; font-size: 0.95rem; }
.input-wrapper input::placeholder { color: rgba(255,255,255,0.25); }

.input-wrapper-textarea textarea {
  background: rgba(0, 0, 0, 0.3); border: 1px solid var(--glass-border); border-radius: 10px;
  color: #fff; width: 100%; outline: none; padding: 14px; min-height: 110px; resize: vertical;
  font-size: 0.95rem; transition: var(--transition-smooth);
}
.input-wrapper-textarea textarea:focus { border-color: var(--primary); box-shadow: 0 0 10px var(--primary-glow); }

/* Static view inputs */
.input-wrapper-static, .input-wrapper-textarea-static {
  background: rgba(0,0,0,0.2); border: 1px solid var(--glass-border); border-radius: 10px;
  padding: 14px; color: var(--text-main); font-size: 0.95rem; line-height: 1.5;
}
.input-wrapper-static { font-family: 'JetBrains Mono', monospace; color: var(--primary); }

/* =========================================================================
   APPLICATION CORE WORKSPACE DESKTOP SIDEBAR ARCHITECTURE
   ========================================================================= */
.workspace-wrapper { display: flex; height: 100vh; width: 100vw; }

.navigation-sidebar {
  width: var(--sidebar-width); max-width: var(--sidebar-width); min-width: var(--sidebar-width);
  background: var(--glass-bg); border-right: 1px solid var(--glass-border);
  display: flex; flex-direction: column; padding: 24px; backdrop-filter: blur(25px); -webkit-backdrop-filter: blur(25px);
  z-index: 1000;
}
.sidebar-identity { display: flex; align-items: center; gap: 14px; margin-bottom: 35px; }
.svg-logo-sm { width: 42px; height: 42px; }
.identity-text h3 { font-size: 1.1rem; font-weight: 800; letter-spacing: -0.3px; }
.pulse-indicator { font-size: 0.75rem; color: var(--success); display: flex; align-items: center; gap: 6px; margin-top: 2px; font-weight: 500; }
.dot { width: 7px; height: 7px; background: var(--success); border-radius: 50%; box-shadow: 0 0 8px var(--success); }

.sidebar-links-group { display: flex; flex-direction: column; gap: 8px; flex-grow: 1; }
.nav-tab-trigger {
  display: flex; align-items: center; gap: 14px; padding: 14px 18px; background: transparent;
  color: var(--text-muted); text-align: left; border-radius: 12px; font-size: 0.95rem; width: 100%;
}
.nav-tab-trigger i { font-size: 1.1rem; width: 20px; text-align: center; }
.nav-tab-trigger:hover { background: rgba(255, 255, 255, 0.05); color: var(--text-main); }
.nav-tab-trigger.active { background: rgba(56, 189, 248, 0.1); color: var(--primary); border: 1px solid rgba(56, 189, 248, 0.15); }

/* --- PROFILE META NODE CARD --- */
.sidebar-profile-card {
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(0, 0, 0, 0.25); padding: 14px; border-radius: 16px;
  border: 1px solid var(--glass-border); margin-top: auto;
}
.profile-card-core { display: flex; align-items: center; gap: 12px; overflow: hidden; }
.user-avatar-frame {
  width: 38px; height: 38px; background: linear-gradient(135deg, var(--accent), #4f46e5);
  border-radius: 50%; display: flex; justify-content: center; align-items: center;
  font-weight: 700; color: #fff; font-size: 0.95rem; flex-shrink: 0; box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.user-core-details { overflow: hidden; }
.user-core-details h4 { font-size: 0.85rem; font-weight: 700; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; }
.role-badge { display: inline-block; font-size: 0.7rem; color: var(--primary); font-weight: 600; text-transform: uppercase; margin-top: 1px; }
.logout-action-trigger { background: transparent; color: var(--text-muted); padding: 8px; font-size: 1.1rem; border-radius: 8px; }
.logout-action-trigger:hover { color: var(--danger); background: rgba(244, 63, 94, 0.1); }

/* =========================================================================
   CENTRAL CONTENT FRAME AREA CONTROLLER
   ========================================================================= */
.content-frame-container {
  flex-grow: 1; overflow-y: auto; padding: 40px; position: relative;
  scroll-behavior: smooth; -webkit-overflow-scrolling: touch;
}
.view-panel-viewport {
  max-width: 840px; margin: 0 auto; animation: slideInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.view-title-header { margin-bottom: 30px; display: flex; justify-content: space-between; align-items: flex-end; }
.view-title-header h2 { font-size: 1.8rem; font-weight: 800; letter-spacing: -0.5px; }

/* --- GLASS CONTAINER BLOCKS --- */
.glass-card {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 18px; padding: 24px; box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
}

/* --- FEED TIMELINE POST MECHANICS --- */
.post-generator-card { padding: 20px; border-color: rgba(255,255,255,0.1); }
.generator-header { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; color: var(--text-muted); margin-bottom: 12px; }
.generator-header i { color: var(--danger); margin-right: 4px; }
.post-generator-card textarea {
  width: 100%; min-height: 80px; background: transparent; border: none; outline: none;
  color: #fff; font-size: 1rem; resize: none; line-height: 1.5;
}
.generator-footer {
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--glass-border); padding-top: 14px; margin-top: 10px;
}
.formatting-hints { font-size: 0.75rem; color: var(--text-muted); }

.timeline-stream-container { margin-top: 25px; }
.post-item-node { margin-bottom: 16px; transition: var(--transition-smooth); }
.post-item-node:hover { border-color: rgba(255,255,255,0.14); }
.user-meta { display: flex; align-items: center; gap: 12px; }
.author-link { font-size: 0.95rem; font-weight: 700; color: var(--text-main); transition: var(--transition-smooth); }
.author-link:hover { color: var(--primary); }

/* --- ADMIN SECURITY ZONES --- */
.administration-restricted-zone {
  border: 1px dashed rgba(244, 63, 94, 0.3); background: rgba(244, 63, 94, 0.02); margin-bottom: 25px;
}
.zone-label-banner {
  font-size: 0.8rem; font-weight: 700; color: var(--danger); text-transform: uppercase;
  letter-spacing: 0.5px; display: flex; align-items: center; gap: 6px; margin-bottom: 15px;
}
.modern-input-field-core {
  width: 100%; background: rgba(0,0,0,0.4); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 12px; color: #fff; outline: none; font-size: 0.95rem; margin-bottom: 12px;
}
.modern-input-field-core:focus { border-color: var(--danger); }

/* --- PROFILE SCHEDULING MATRIX GRID --- */
.structural-input-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.grid-field-cell select {
  width: 100%; background: rgba(0,0,0,0.4); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 12px; color: #fff; outline: none; font-size: 0.95rem; height: 46px;
}
.grid-field-cell input {
  width: 100%; background: rgba(0,0,0,0.4); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 12px; color: #fff; outline: none; font-size: 0.95rem; height: 46px;
}
.full-width-span { grid-column: span 2; }

/* Routine Display Cards */
.routine-cards-masonry-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 25px; }
.routine-card-node { border-left: 4px solid var(--primary); }
.routine-day-tag { font-size: 0.75rem; font-weight: 800; color: var(--primary); text-transform: uppercase; letter-spacing: 0.5px; }
.routine-time-stamp { font-family: 'JetBrains Mono', monospace; font-size: 1.1rem; font-weight: 700; margin: 6px 0; }
.routine-course-title { font-size: 0.95rem; font-weight: 700; line-height: 1.4; color: var(--text-main); }
.routine-meta-row { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--text-muted); margin-top: 12px; border-top: 1px solid rgba(255,255,255,0.04); padding-top: 8px; }

/* Notice Bulletin Layout */
.bulletin-board-layout { display: flex; flex-direction: column; gap: 16px; margin-top: 25px; }
.notice-card-node { border-left: 4px solid var(--accent); }
.notice-header-row { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.notice-timestamp { font-size: 0.75rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }

/* --- PROFILE EDIT ENGINE EXTRA STYLES --- */
.form-dual-column-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.read-only-field-lock { opacity: 0.6; cursor: not-allowed; }
.form-execution-footer-actions { display: flex; justify-content: space-between; margin-top: 25px; border-top: 1px solid var(--glass-border); padding-top: 20px; }
.mobile-only-action-node { display: none; }

/* =========================================================================
   SYSTEM CORE SCREEN MATRIX BREAKPOINTS (NATIVE TRANSFORMATION SYSTEM)
   ========================================================================= */
@media (max-width: 768px) {
  .workspace-wrapper { flex-direction: column; }
  
  /* Hide Desktop Native Layout Blocks */
  .sidebar-identity, .sidebar-profile-card { display: none !important; }
  
  /* SYSTEM TRANSFORMATION: Bottom App Navigation Bar */
  .navigation-sidebar {
    position: fixed; bottom: 0; left: 0;
    width: 100vw; max-width: 100vw; min-width: 100vw;
    height: 72px; padding: 0;
    flex-direction: row; border-right: none;
    border-top: 1px solid var(--glass-border);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.4);
    background: rgba(9, 13, 22, 0.85);
  }
  
  .sidebar-links-group {
    flex-direction: row; justify-content: space-around; align-items: center;
    width: 100%; height: 100%; gap: 0;
  }
  
  .nav-tab-trigger {
    flex-direction: column; gap: 4px; padding: 10px 0;
    height: 100%; flex-grow: 1; text-align: center;
    border-radius: 0; justify-content: center; font-size: 0.7rem;
    color: var(--text-muted); border: none !important; background: transparent !important;
  }
  
  .nav-tab-trigger i { font-size: 1.25rem; width: auto; }
  .nav-tab-trigger span { display: block; font-weight: 500; }
  .nav-tab-trigger.active { color: var(--primary); }
  
  /* Mobile Content Padding Adaptation Framework */
  .content-frame-container { padding: 20px 16px 92px 16px; }
  .view-panel-viewport { padding-bottom: 20px; }
  .view-title-header h2 { font-size: 1.5rem; }
  
  /* Structural Degradation Grids */
  .form-dual-column-layout, .structural-input-grid { grid-template-columns: 1fr; gap: 0; }
  .full-width-span { grid-column: span 1; }
  
  .mobile-only-action-node { display: inline-flex; color: var(--danger); }
  .form-execution-footer-actions { justify-content: space-between; gap: 10px; }
  .form-execution-footer-actions button { flex: 1; font-size: 0.85rem; padding: 12px 10px; }
}

/* --- HARDWARE ACCELERATED RENDER ANIMATIONS --- */
@keyframes slideInUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }