/*
   PASSWORD GENERATOR - EXPERT WEB TOOLS
*/

@font-face { font-family: 'Inter';       src: url('/fonts/inter-v20-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Orbitron';    src: url('/fonts/orbitron-v35-latin-700.woff2')  format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Roboto Mono'; src: url('/fonts/roboto-mono-v31-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }

:root {
    /* Dark Theme Variables (Default) */
    --bg-main:            #0a0a0f;
    --primary-accent:     #3b82f6;
    --secondary-accent:   #8b5cf6;
    --text-main:          #ffffff;
    --text-muted:         #94a3b8;
    --card-bg:            rgba(25, 25, 35, 0.6);
    --card-border:        rgba(255, 255, 255, 0.08);
    --input-bg:           rgba(255, 255, 255, 0.05);
    --hero-bg:            rgba(0, 0, 0, 0.3);
    --row-bg:             rgba(0, 0, 0, 0.3);
    --hover-bg:           rgba(255, 255, 255, 0.1);
    
    --strength-weak:      #ef4444;
    --strength-medium:    #f59e0b;
    --strength-strong:    #10b981;
    --strength-very-strong: #3b82f6;
    
    --font-heading:       'Orbitron', sans-serif;
    --font-body:          'Inter', sans-serif;
    --font-code:          'Roboto Mono', monospace;
}

/* Light Theme Variables applied to HTML root globally */
html.light-theme {
    --bg-main:            #f8fafc;
    --primary-accent:     #2563eb;
    --secondary-accent:   #7c3aed;
    --text-main:          #0f172a;
    --text-muted:         #475569;
    --card-bg:            #ffffff;
    --card-border:        #cbd5e1;
    --input-bg:           #f1f5f9;
    --hero-bg:            #ffffff;
    --row-bg:             #ffffff;
    --hover-bg:           rgba(0, 0, 0, 0.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* FIX: Ensure html/body width is 100% and overflow-x hidden is NOT applied */
html, body {
    width: 100%;
    max-width: 100%;
    /* FIX: Transition bug fix for Chromium */
    transition: background-color 0.2s ease;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

/* Accessibility */
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* Dynamic Glow */
.background-glow {
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at center, rgba(59,130,246,0.08) 0%, transparent 50%);
    z-index: -1; pointer-events: none;
    transition: background 0.3s ease;
}
html.light-theme .background-glow {
    background: radial-gradient(circle at center, rgba(37,99,235,0.05) 0%, transparent 50%);
}

/* Header */
.tool-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.5rem 5%; max-width: 1400px; margin: 0 auto; width: 100%;
    flex-wrap: wrap; gap: 8px;
}
.back-btn {
    color: var(--text-muted); text-decoration: none;
    display: flex; align-items: center; gap: 8px; transition: color 0.3s;
    border-radius: 4px; padding: 2px 4px; font-weight: 500;
}
.back-btn:hover { color: var(--primary-accent); }
.back-btn:focus-visible { outline: 2px solid var(--primary-accent); color: var(--primary-accent); }

.logo { font-family: var(--font-heading); font-size: 1.2rem; margin: 0 auto; }
.logo span { color: var(--primary-accent); }

/* Theme Toggle Button Standardized */
.theme-toggle-btn {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    font-size: 1.25rem; transition: color 0.2s; padding: 6px;
    display: flex; align-items: center; justify-content: center;
}
.theme-toggle-btn:hover { color: var(--primary-accent); }
.theme-toggle-btn:focus-visible { outline: 2px solid var(--primary-accent); border-radius: 4px; }

/* Intro */
.tool-intro { text-align: center; margin-bottom: 2rem; padding: 0 5%; }
.tool-intro h1 { font-family: var(--font-heading); font-size: 2rem; margin-bottom: 0.5rem; line-height: 1.2; }
.tool-intro p { color: var(--text-muted); }

/* Main Layout */
.main-content { flex-grow: 1; padding: 2rem 5%; max-width: 1100px; margin: 0 auto; width: 100%; }
.tool-layout { display: grid; grid-template-columns: minmax(280px, 350px) 1fr; gap: 2rem; align-items: start; width: 100%; }

/* Cards */
.card {
    background: var(--card-bg); border: 1px solid var(--card-border);
    border-radius: 16px; padding: 1.5rem; margin-bottom: 1.5rem;
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    width: 100%; transition: background 0.3s ease, border-color 0.3s ease;
}
.card h3 { font-family: var(--font-heading); font-size: 0.9rem; color: var(--text-muted); margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 1px; }

/* Tabs */
.mode-toggle { display: flex; background: var(--input-bg); padding: 4px; border-radius: 8px; border: 1px solid var(--card-border); }
.mode-btn {
    flex: 1; background: transparent; border: none; color: var(--text-muted);
    padding: 10px; border-radius: 6px; cursor: pointer; font-weight: 600;
    transition: all 0.2s; font-size: 0.9rem; font-family: var(--font-body);
    min-height: 44px; display: flex; align-items: center; justify-content: center; gap: 6px;
}
.mode-btn.active { background: var(--primary-accent); color: #fff; }
.mode-btn:hover:not(.active) { color: var(--text-main); }
.mode-btn:focus-visible { outline: 2px solid var(--primary-accent); }

/* Range */
.range-group { margin-bottom: 1.5rem; }
.range-header { display: flex; justify-content: space-between; margin-bottom: 8px; color: var(--text-muted); font-size: 0.95rem; }
.value-badge { background: var(--input-bg); color: var(--text-main); padding: 2px 8px; border-radius: 4px; font-family: var(--font-code); font-size: 0.9rem; border: 1px solid var(--card-border); }
input[type="range"] { width: 100%; cursor: pointer; accent-color: var(--primary-accent); }
input[type="range"]:focus-visible { outline: 2px solid var(--primary-accent); border-radius: 4px; }

/* Checkboxes, Radios, and Custom Input */
.checkbox-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 0.5rem; }
.checkbox-item, .checkbox-single label, .radio-item { display: flex; align-items: center; gap: 10px; cursor: pointer; color: var(--text-main); font-size: 0.95rem; user-select: none; }
.checkbox-single { margin-top: 1rem; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--primary-accent); width: 16px; height: 16px; cursor: pointer; flex-shrink: 0; min-width: 16px; min-height: 16px; }
input[type="checkbox"]:focus-visible, input[type="radio"]:focus-visible { outline: 2px solid var(--primary-accent); }

.custom-symbols-group { margin-bottom: 1rem; padding-left: 26px; }
.custom-input { width: 100%; background: var(--input-bg); border: 1px solid var(--card-border); color: var(--text-main); padding: 8px; border-radius: 6px; font-family: var(--font-code); font-size: 0.85rem; }
.custom-input:focus { outline: 2px solid var(--primary-accent); border-color: transparent; }

.separator-group { margin-top: 1rem; color: var(--text-muted); font-size: 0.95rem; }
.radio-options { display: flex; gap: 1rem; margin-top: 0.5rem; flex-wrap: wrap; }

/* Buttons */
.primary-btn { width: 100%; background: var(--primary-accent); color: #fff; border: none; padding: 14px; border-radius: 8px; font-size: 1rem; gap: 8px; font-weight: 600; cursor: pointer; min-height: 44px; display: flex; align-items: center; justify-content: center; transition: background 0.2s; }
.primary-btn:hover { background: #2563eb; }
.primary-btn:focus-visible { outline: 2px solid var(--secondary-accent); outline-offset: 2px; }

/* Hero Box */
.hero-output-box {
    background: var(--hero-bg); border: 1px solid var(--primary-accent);
    border-radius: 12px; padding: 1.5rem; margin-bottom: 2rem; position: relative;
}
.hero-header { font-size: 0.85rem; color: var(--primary-accent); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; font-weight: bold; }
.hero-content { display: flex; justify-content: space-between; align-items: center; gap: 15px; margin-bottom: 1.5rem; }
.hero-password-text {
    flex: 1; font-size: clamp(1rem, 4vw, 2rem); color: var(--text-main); font-family: var(--font-code);
    word-break: break-all; white-space: normal; line-height: 1.3; min-width: 0;
}

.hero-actions { display: flex; gap: 10px; flex-shrink: 0; }
.icon-btn {
    background: transparent; border: 1px solid var(--card-border);
    color: var(--text-muted); padding: 8px; border-radius: 6px;
    cursor: pointer; font-size: 1rem; display: flex; align-items: center; justify-content: center;
    min-height: 44px; min-width: 44px; transition: all 0.2s;
}
.icon-btn:hover { background: var(--hover-bg); color: var(--text-main); border-color: var(--primary-accent); }
.icon-btn.remove:hover { color: #ef4444; background: rgba(239,68,68,0.1); border-color: rgba(239,68,68,0.3); }

/* Strength Meter */
.strength-meter-container { border-top: 1px solid var(--card-border); padding-top: 1rem; }
.strength-summary { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.strength-label { color: var(--text-muted); font-size: 0.9rem; }
.font-bold { font-weight: bold; }
.strength-bar { width: 100%; height: 6px; background: var(--input-bg); border-radius: 3px; overflow: hidden; border: 1px solid var(--card-border); }
.strength-bar-fill { height: 100%; width: 0%; transition: width 0.4s ease, background-color 0.4s ease; border-radius: 3px; }
.strength-bar-fill.weak { background-color: var(--strength-weak); width: 25%; }
.strength-bar-fill.medium { background-color: var(--strength-medium); width: 50%; }
.strength-bar-fill.strong { background-color: var(--strength-strong); width: 75%; }
.strength-bar-fill.very-strong { background-color: var(--strength-very-strong); width: 100%; }
.text-weak { color: var(--strength-weak); }
.text-medium { color: var(--strength-medium); }
.text-strong { color: var(--strength-strong); }
.text-very-strong { color: var(--strength-very-strong); }

/* Result Header & List */
.result-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.result-header h2 { font-size: 1rem; color: var(--text-muted); font-family: var(--font-heading); margin: 0; text-transform: uppercase; letter-spacing: 1px; }

.add-row-btn {
    background: transparent; border: 1px solid var(--card-border);
    color: var(--text-muted); padding: 6px 12px; border-radius: 6px;
    cursor: pointer; font-size: 0.85rem; transition: all 0.2s;
    display: flex; align-items: center; gap: 6px; min-height: 44px;
}
.add-row-btn:hover:not(:disabled) { color: var(--text-main); border-color: var(--text-main); background: var(--hover-bg); }
.add-row-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.password-list {
    display: flex; flex-direction: column; gap: 10px;
    margin-bottom: 1.5rem; max-height: 400px; overflow-y: auto; width: 100%;
    scrollbar-width: thin; scrollbar-color: var(--card-border) transparent;
}
.password-row {
    background: var(--row-bg); border: 1px solid var(--card-border);
    border-radius: 8px; padding: 12px 15px; display: flex; align-items: center; gap: 10px;
    width: 100%; max-width: 100%; box-sizing: border-box; cursor: pointer; transition: all 0.2s;
}
.password-row:hover { border-color: var(--primary-accent); background: rgba(59,130,246,0.05); }
.password-row:focus-visible { outline: 2px solid var(--primary-accent); border-radius: 8px; }

.password-text-wrapper { flex: 1; min-width: 0; }
.password-text {
    font-size: 1.1rem; color: var(--text-muted); font-family: var(--font-code);
    display: block; width: 100%; word-break: break-all; white-space: normal; line-height: 1.3; pointer-events: none;
}
.password-row:hover .password-text { color: var(--text-main); }
.row-actions { display: flex; gap: 5px; flex-shrink: 0; }

.info-card-mini { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.info-card-mini i { color: #10b981; margin-right: 5px; }

/* Modal & QR */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); z-index: 2000;
    display: flex; align-items: center; justify-content: center; backdrop-filter: blur(5px); padding: 1rem;
}
.modal-box {
    background: var(--card-bg); border: 1px solid var(--card-border); padding: 2.5rem; border-radius: 12px; position: relative; text-align: center; max-width: 90%; width: 320px;
}
.modal-box h3 { font-family: var(--font-heading); margin-bottom: 5px; color: var(--text-main); }
.modal-box .hint { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 20px; }
.close-btn {
    position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 1.5rem; color: var(--text-muted); cursor: pointer; transition: color 0.2s;
    min-height: 44px; min-width: 44px; display: flex; align-items: center; justify-content: center; border-radius: 6px;
}
.close-btn:hover { color: #ef4444; }

/* FIX: Sharp contrast boundary for QR code to ensure scannability in light mode */
#qrcode { 
    background: #ffffff; 
    padding: 1.5rem; 
    border-radius: 8px; 
    display: inline-block; 
    border: 1px solid #cbd5e1;
}

/* Toast */
.toast {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #1e1e24; border: 1px solid var(--primary-accent);
    color: #fff; padding: 10px 20px; border-radius: 8px; z-index: 3000; box-shadow: 0 4px 12px rgba(0,0,0,0.5); font-size: 0.9rem;
    white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.toast.toast-visible { opacity: 1; pointer-events: auto; }
html.light-theme .toast { background: #ffffff; color: #0f172a; border-color: var(--primary-accent); }

.hidden { display: none !important; }

/* Info & FAQ */
.info-section { margin-top: 4rem; padding: 0 1rem; width: 100%; }
.info-section h2 { font-family: var(--font-heading); color: var(--text-main); margin-bottom: 2rem; font-size: 1.5rem; text-align: center; }
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.info-grid h3 { color: var(--primary-accent); font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: 0.5rem; }
.info-grid i { margin-right: 8px; }
.info-grid p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

.faq-container { margin-top: 3rem; background: var(--card-bg); border: 1px solid var(--card-border); padding: 2rem; border-radius: 16px; }
.faq-container h3 { font-family: var(--font-heading); color: var(--text-main); margin-bottom: 1.5rem; border-bottom: 1px solid var(--card-border); padding-bottom: 0.5rem; }
.faq-container h4 { color: var(--primary-accent); font-size: 1rem; margin-bottom: 0.5rem; margin-top: 1.5rem; font-family: var(--font-body); }
.faq-container p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1rem; line-height: 1.6; }

footer { text-align: center; padding: 3rem 0; color: var(--text-muted); font-size: 0.9rem; border-top: 1px solid var(--card-border); margin-top: 3rem; }
footer a { color: var(--primary-accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 900px) {
    .tool-layout { grid-template-columns: 1fr; }
    .result-panel { order: -1; }
    .info-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .tool-header, .main-content { padding: 1.5rem 1rem; }
    .card { padding: 1.25rem; }
    .hero-content { flex-direction: column; text-align: center; }
    .hero-actions { justify-content: center; }
    .tool-intro h1 { font-size: 1.6rem; }
    .logo { margin: 0; }
}
@media (max-width: 480px) {
    .tool-header { align-items: center; justify-content: space-between; }
    .tool-intro h1 { font-size: 1.3rem; }
    .card { padding: 1rem; border-radius: 12px; }
    .checkbox-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
    .radio-options { flex-direction: column; gap: 0.75rem; }
    .password-list { max-height: 300px; }
    .hero-output-box { padding: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}