/* landing.css - Secure Academic Studio Landing Page Styles (CSP Compliant) */

/* ==========================================================================
   1. LOCAL FONTS (ZERO TRACKING)
   ========================================================================== */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400; font-display: swap; src: url('/fonts/inter-regular.woff2') format('woff2'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 500; font-display: swap; src: url('/fonts/inter-500.woff2') format('woff2'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 600; font-display: swap; src: url('/fonts/inter-600.woff2') format('woff2'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 700; font-display: swap; src: url('/fonts/inter-700.woff2') format('woff2'); }

@font-face { font-family: 'Lora'; font-style: normal; font-weight: 400; font-display: swap; src: url('/fonts/lora-regular.woff2') format('woff2'); }
@font-face { font-family: 'Lora'; font-style: normal; font-weight: 500; font-display: swap; src: url('/fonts/lora-500.woff2') format('woff2'); }
@font-face { font-family: 'Lora'; font-style: normal; font-weight: 600; font-display: swap; src: url('/fonts/lora-600.woff2') format('woff2'); }

/* ==========================================================================
   2. THEME VARIABLES (LIGHT & DARK)
   ========================================================================== */
:root {
  color-scheme: light;
  /* LIGHT MODE */
  --bg-main: #f8fafc;
  --text-main: #1e293b;
  --text-muted: #475569;
  --text-subtle: #64748b;
  
  --grid-color: rgba(97, 114, 240, 0.1);
  --glow-color: rgba(97, 114, 240, 0.12);
  
  --card-bg: #ffffff;
  --card-border: rgba(15, 23, 42, 0.12);
  --card-hover-bg: #fdfeff;
  --card-hover-border: rgba(97, 114, 240, 0.4);
  --card-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 4px 15px rgba(0,0,0,0.03);

  --snack-bg: #ffffff;
  --snack-border: rgba(15, 23, 42, 0.15);
  --snack-hover-bg: #f4f6ff;
  
  --select-bg: #ffffff;
  --select-border: rgba(15, 23, 42, 0.2);
  --select-text: #1e293b;

  --trust-badge-bg: rgba(97, 114, 240, 0.1);
  --trust-badge-border: rgba(97, 114, 240, 0.3);
  --trust-badge-text: #3b40c8;
  
  --icon-wrap-bg: rgba(97, 114, 240, 0.12);
  --icon-wrap-border: rgba(97, 114, 240, 0.25);
  --icon-color: #4a52e3;
  
  --divider: linear-gradient(90deg, transparent, rgba(15, 23, 42, 0.1), transparent);
  
  --grad-start: #0f172a;
  --grad-mid: #4a52e3;
  --grad-end: #3b40c8;
  
  --alert-bg: #f0fdf4;
  --alert-border: #bbf7d0;
  --alert-text: #166534;
  
  --alert-indigo-bg: #eef2ff;
  --alert-indigo-border: #c7d2fe;
  --alert-indigo-text: #3730a3;

  /* Support Banner */
  --support-bg: rgba(97, 114, 240, 0.05);
  --support-border: rgba(97, 114, 240, 0.15);

  /* Modals */
  --modal-bg: #ffffff;

  /* Cookie Banner */
  --banner-bg: rgba(255, 255, 255, 0.85);
  --banner-border: rgba(15, 23, 42, 0.1);
}

[data-theme="dark"] {
  color-scheme: dark;
  /* DARK MODE */
  --bg-main: #0d1117;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  
  --grid-color: rgba(97, 114, 240, 0.04);
  --glow-color: rgba(97, 114, 240, 0.18);
  
  --card-bg: rgba(255, 255, 255, 0.035);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover-bg: rgba(97, 114, 240, 0.04);
  --card-hover-border: rgba(97, 114, 240, 0.3);
  --card-shadow: none;

  --snack-bg: rgba(255, 255, 255, 0.02);
  --snack-border: rgba(255, 255, 255, 0.06);
  --snack-hover-bg: rgba(97, 114, 240, 0.06);
  
  --select-bg: rgba(255, 255, 255, 0.05);
  --select-border: rgba(255, 255, 255, 0.15);
  --select-text: #e2e8f0;

  --trust-badge-bg: rgba(97, 114, 240, 0.08);
  --trust-badge-border: rgba(97, 114, 240, 0.25);
  --trust-badge-text: #a5bbfb;
  
  --icon-wrap-bg: rgba(97, 114, 240, 0.12);
  --icon-wrap-border: rgba(97, 114, 240, 0.22);
  --icon-color: #8098f7;
  
  --divider: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
  
  --grad-start: #e2e8f0;
  --grad-mid: #a5bbfb;
  --grad-end: #6172f0;

  --alert-bg: rgba(16, 185, 129, 0.05);
  --alert-border: rgba(16, 185, 129, 0.15);
  --alert-text: #34d399;
  
  --alert-indigo-bg: rgba(79, 70, 229, 0.05);
  --alert-indigo-border: rgba(79, 70, 229, 0.15);
  --alert-indigo-text: #818cf8;

  /* Support Banner */
  --support-bg: rgba(97, 114, 240, 0.04);
  --support-border: rgba(97, 114, 240, 0.15);

  /* Modals */
  --modal-bg: #0f172a;

  /* Cookie Banner */
  --banner-bg: rgba(13, 17, 23, 0.85);
  --banner-border: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   3. BASE STYLES & TYPOGRAPHY
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: 'Inter', system-ui, sans-serif;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3 { color: var(--text-main); }
p { color: var(--text-muted); }

/* Replacement for inline style="..." tags */
.text-icon-color { color: var(--icon-color); }
.text-inherit { color: inherit; }
.text-subtle-color { color: var(--text-subtle); }

/* ==========================================================================
   4. COMPONENTS
   ========================================================================== */

/* Hero Effects */
.bg-grid {
  background-image: linear-gradient(var(--grid-color) 1px, transparent 1px),
                    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 48px 48px;
}

.hero-glow {
  background: radial-gradient(ellipse 80% 50% at 50% -10%, var(--glow-color) 0%, transparent 70%);
}

.text-gradient {
  background: linear-gradient(135deg, var(--grad-start) 0%, var(--grad-mid) 50%, var(--grad-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Toolbar & Selects */
.toolbar-select {
  height: 36px; border-radius: 0.5rem; border: 1px solid var(--select-border); background: var(--select-bg);
  color: var(--select-text); padding: 0 2.1rem 0 2.2rem; font-size: 0.8125rem; font-weight: 500;
  appearance: none; cursor: pointer; transition: all 0.2s ease; width: 140px;
}
.toolbar-select:hover, .toolbar-select:focus { border-color: rgba(97, 114, 240, 0.5); outline: none; }
.toolbar-select option { background: var(--bg-main); color: var(--text-main); }

.toolbar-btn {
  height: 36px; width: 36px; border-radius: 0.5rem; border: 1px solid var(--select-border);
  background: var(--select-bg); color: var(--select-text); display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 0.2s ease; flex-shrink: 0;
}
.toolbar-btn:hover { border-color: rgba(97, 114, 240, 0.5); }

.select-wrap { position: relative; display: inline-flex; align-items: center; }
.sel-icon-l, .sel-icon-r { position: absolute; pointer-events: none; opacity: 0.65; color: var(--select-text); }
.sel-icon-l { left: 0.65rem; } 
.sel-icon-r { right: 0.65rem; }

/* Badges */
.trust-badge {
  background: var(--trust-badge-bg); border: 1px solid var(--trust-badge-border);
  backdrop-filter: blur(8px); color: var(--trust-badge-text);
}

/* Cards */
.value-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow); transition: all 0.25s ease;
}
.value-card:hover { background: var(--card-hover-bg); border-color: var(--card-hover-border); }

.snack-card {
  background: var(--snack-bg); border: 1px solid var(--snack-border);
  border-radius: 8px; padding: 0.75rem 1rem; display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem; transition: all 0.2s ease; text-decoration: none; box-shadow: var(--card-shadow);
}
.snack-card:hover { background: var(--snack-hover-bg); border-color: var(--card-hover-border); transform: translateY(-2px); }
.snack-title { color: var(--text-main); }
.snack-subtitle { color: var(--text-subtle); }

.tool-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow); transition: all 0.22s ease;
  text-decoration: none; display: flex;
}
.tool-card:hover {
  transform: translateY(-4px); border-color: var(--card-hover-border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1), 0 0 0 1px rgba(97, 114, 240, 0.25);
}
[data-theme="dark"] .tool-card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(97, 114, 240, 0.25);
}

.tool-card-featured {
  background: linear-gradient(145deg, var(--trust-badge-bg) 0%, var(--card-bg) 100%);
  border: 1px solid var(--card-hover-border); box-shadow: var(--card-shadow); text-decoration: none; display: flex;
}
.tool-card-featured:hover {
  transform: translateY(-4px); border-color: var(--card-hover-border);
  box-shadow: 0 8px 40px rgba(97, 114, 240, 0.15), 0 0 0 1px rgba(97, 114, 240, 0.5);
}
[data-theme="dark"] .tool-card-featured:hover {
  box-shadow: 0 8px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(97, 114, 240, 0.5), 0 0 48px rgba(97, 114, 240, 0.18);
}

/* Pricing Featured Card (Landing Page specific) */
.pricing-featured-card {
  background: linear-gradient(145deg, var(--card-bg) 0%, rgba(97, 114, 240, 0.06) 100%);
  border: 1px solid var(--card-hover-border);
  box-shadow: var(--card-shadow);
}
.pricing-featured-card:hover {
  box-shadow: 0 10px 40px rgba(97, 114, 240, 0.15), 0 0 0 1px rgba(97, 114, 240, 0.4);
  border-color: rgba(97, 114, 240, 0.6);
}
[data-theme="dark"] .pricing-featured-card:hover {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(97, 114, 240, 0.5), 0 0 40px rgba(97, 114, 240, 0.15);
}

/* Support Cards */
.support-card {
  background: var(--card-bg); 
  border: 1px solid var(--card-border); 
  box-shadow: var(--card-shadow); 
  transition: all 0.3s ease;
}
.support-card:hover { 
  box-shadow: 0 4px 15px rgba(0,0,0,0.08); 
  border-color: var(--card-hover-border); 
  transform: translateY(-2px);
}
[data-theme="dark"] .support-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* Support Buttons */
.btn-support-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; 
  padding: 0.75rem 1.5rem; border-radius: 0.5rem; font-weight: 600; font-size: 0.875rem; 
  transition: all 0.2s; cursor: pointer; border: none; 
  background: var(--icon-color); color: #ffffff; 
}
.btn-support-primary:hover {
  background: var(--grad-end); 
}

.btn-support-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; 
  background: transparent; color: var(--text-main); border: 1px solid var(--select-border); 
  padding: 0.75rem 1.5rem; font-size: 0.875rem; font-weight: 600; border-radius: 0.5rem; 
  cursor: pointer; transition: all 0.2s; 
}
.btn-support-secondary:hover {
  background: rgba(97, 114, 240, 0.05); border-color: var(--icon-color);
}

.icon-wrap {
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  border-radius: 10px; background: var(--icon-wrap-bg); border: 1px solid var(--icon-wrap-border); flex-shrink: 0;
}
.icon-wrap i { color: var(--icon-color); }

/* Alerts & Links */
.alert-box { background: var(--alert-bg); border: 1px solid var(--alert-border); color: var(--alert-text); }
.alert-indigo { background: var(--alert-indigo-bg); border: 1px solid var(--alert-indigo-border); color: var(--alert-indigo-text); }

.arrow-link {
  font-size: 0.875rem; font-weight: 600; display: inline-flex; align-items: center; gap: 4px; transition: gap 0.2s ease;
  color: var(--icon-color);
}
.tool-card:hover .arrow-link, .tool-card-featured:hover .arrow-link, .snack-card:hover .arrow-link { gap: 8px; }

/* Dividers & Banners */
.section-divider { height: 1px; background: var(--divider); }
.support-banner {
  background: var(--support-bg);
  border-top: 1px solid var(--support-border);
  border-bottom: 1px solid var(--support-border);
}

/* ==========================================================================
   5. MODALS & FORMS
   ========================================================================== */
.modal-overlay {
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
  background-color: rgba(0, 0, 0, 0.5); backdrop-filter: blur(4px);
  will-change: opacity; /* Hardware acceleration fix for stuttering */
}
.modal-overlay.show {
  opacity: 1; pointer-events: auto;
}
.hidden-modal { 
  visibility: hidden; 
}
.modal-overlay.show:not(.hidden-modal) {
  visibility: visible;
}

.modal-content {
  background: var(--modal-bg); border: 1px solid var(--card-border);
  transform: scale(0.95); transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  will-change: transform; /* Hardware acceleration fix for stuttering */
}
.modal-overlay.show .modal-content { transform: scale(1); }

.form-input {
  width: 100%; padding: 0.75rem 1rem; border-radius: 0.5rem; border: 1px solid var(--select-border);
  background: var(--bg-main); color: var(--text-main); font-size: 0.875rem; outline: none; transition: border-color 0.2s;
}
.form-input:focus { border-color: var(--icon-color); box-shadow: 0 0 0 2px rgba(74, 82, 227, 0.1); }

/* Cookie Banner Glassmorphism */
#cookie-banner {
  background: var(--banner-bg);
  border-top: 1px solid var(--banner-border);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.cookie-banner-hidden { transform: translateY(100%); }
#cookie-banner.show { transform: translateY(0); }

/* Animations */
.spinner { animation: spin 1s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }