/* ============================================
   EncryptMyKeys — Dark Cybersecurity Theme
   ============================================ */

:root {
    --bg-primary: #060a10;
    --bg-secondary: #0c1220;
    --bg-card: #0f1729;
    --bg-card-hover: #131d33;
    --border: #1a2744;
    --border-glow: #1e90ff22;
    --text-primary: #e8edf5;
    --text-secondary: #8a95a8;
    --text-muted: #556178;
    --accent-cyan: #00d4ff;
    --accent-blue: #1e90ff;
    --accent-green: #00ff88;
    --accent-red: #ff4d6a;
    --accent-purple: #a855f7;
    --gradient-main: linear-gradient(135deg, #00d4ff, #1e90ff, #a855f7);
    --gradient-encrypt: linear-gradient(135deg, #00d4ff 0%, #1e90ff 100%);
    --gradient-decrypt: linear-gradient(135deg, #00ff88 0%, #00d4ff 100%);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.1);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-sm: 8px;
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;
    --nav-height: 72px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    font-size: 16px;
    font-weight: 400;
}

/* RTL support */
[dir="rtl"] { direction: rtl; text-align: right; }

/* ============================================
   Particle Canvas
   ============================================ */
#particleCanvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.5;
}

/* ============================================
   Navigation
   ============================================ */
.main-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: rgba(6, 10, 16, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo { display: flex; align-items: center; text-decoration: none; }

.logo-img {
    height: 44px;
    width: auto;
    transition: transform 0.3s ease;
}
.logo-img:hover { transform: scale(1.05); }

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}
.nav-link:hover {
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.06);
}
.nav-link.active {
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.2);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Language Selector */
.lang-selector { position: relative; }

/* Pro Button */
.nav-pro-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    background: linear-gradient(135deg, rgba(212,168,83,0.15), rgba(212,168,83,0.05));
    border: 1px solid rgba(212,168,83,0.3);
    border-radius: 20px;
    color: #d4a853;
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
    white-space: nowrap;
}
.nav-pro-btn:hover {
    background: linear-gradient(135deg, rgba(212,168,83,0.25), rgba(212,168,83,0.1));
    border-color: rgba(212,168,83,0.5);
    color: #e8c06a;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(212,168,83,0.15);
}
.nav-pro-btn svg { opacity: 0.8; }

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.3s ease;
}
.lang-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.06);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 320px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    box-shadow: var(--shadow-card), 0 0 60px rgba(0, 212, 255, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s ease;
    z-index: 2000;
}
.lang-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

.lang-option {
    display: block;
    width: 100%;
    text-align: left;
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}
.lang-option:hover {
    background: rgba(0, 212, 255, 0.08);
    color: var(--accent-cyan);
}
.lang-option.active {
    background: rgba(0, 212, 255, 0.12);
    color: var(--accent-cyan);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}
.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: rgba(6, 10, 16, 0.95);
    backdrop-filter: blur(20px);
    padding: 16px 24px;
    z-index: 999;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 4px;
}
.mobile-menu.open { display: flex; }

.nav-pro-mobile {
    display: flex !important;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    padding: 10px 14px !important;
    background: linear-gradient(135deg, rgba(212,168,83,0.12), rgba(212,168,83,0.04)) !important;
    border: 1px solid rgba(212,168,83,0.25);
    border-radius: 10px;
    color: #d4a853 !important;
    font-weight: 600;
}

.mobile-link {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}
.mobile-link:hover, .mobile-link.active {
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.08);
}

/* ============================================
   Page Content
   ============================================ */
.page-content {
    position: relative;
    z-index: 1;
    max-width: 860px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + 40px) 24px 60px;
}

/* ============================================
   Hero
   ============================================ */
.hero {
    text-align: center;
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    color: var(--accent-cyan);
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
}
.hero-title span { display: block; }

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ============================================
   Tool Card
   ============================================ */
.tool-section { margin-bottom: 60px; }

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease 0.15s both;
}
.tool-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-encrypt);
    opacity: 0.6;
}
[data-page="decrypt"] .tool-card::before {
    background: var(--gradient-decrypt);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}

.card-icon {
    width: 56px; height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.encrypt-icon {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 212, 255, 0.2);
}
.decrypt-icon {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(0, 255, 136, 0.2);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}
.card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

textarea, input[type="password"], input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    resize: vertical;
    transition: all 0.3s ease;
    outline: none;
}
textarea:focus, input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1), 0 0 20px rgba(0, 212, 255, 0.05);
}
textarea::placeholder, input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-body);
}

.char-count {
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.password-wrapper {
    position: relative;
}
.password-wrapper input {
    padding-right: 48px;
}
.toggle-pass {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s;
}
.toggle-pass:hover { color: var(--accent-cyan); }

/* Password Strength */
.strength-bar {
    height: 3px;
    background: var(--border);
    border-radius: 3px;
    margin-top: 8px;
    overflow: hidden;
}
.strength-fill {
    height: 100%;
    width: 0%;
    border-radius: 3px;
    transition: all 0.4s ease;
}
.strength-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-top: 4px;
    display: block;
}

/* Action Buttons */
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    position: relative;
    overflow: hidden;
}
.action-btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
}
.action-btn:hover::before { left: 100%; }

.encrypt-btn {
    background: var(--gradient-encrypt);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}
.encrypt-btn:hover {
    box-shadow: 0 4px 30px rgba(0, 212, 255, 0.5);
    transform: translateY(-1px);
}

.decrypt-btn {
    background: var(--gradient-decrypt);
    color: #000;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
}
.decrypt-btn:hover {
    box-shadow: 0 4px 30px rgba(0, 255, 136, 0.5);
    transform: translateY(-1px);
}

/* Output */
.output-section {
    margin-top: 24px;
    animation: fadeInUp 0.5s ease;
}
.output-section label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.output-box {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-sm);
    padding: 16px;
    padding-right: 80px;
}
.output-box.success {
    border-color: rgba(0, 255, 136, 0.3);
}
.output-box pre {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.6;
}
.output-box.success pre {
    color: var(--accent-green);
}

.copy-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s ease;
}
.copy-btn:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
    border-color: rgba(0, 212, 255, 0.3);
}
.copy-btn.copied {
    background: rgba(0, 255, 136, 0.15);
    color: var(--accent-green);
    border-color: rgba(0, 255, 136, 0.3);
}

/* Error box */
.error-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(255, 77, 106, 0.08);
    border: 1px solid rgba(255, 77, 106, 0.25);
    border-radius: var(--radius-sm);
    color: var(--accent-red);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    transition: all 0.3s ease;
}
.feature:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 52px; height: 52px;
    margin: 0 auto 16px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
}

.feature h3 {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}
.feature p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   About Page
   ============================================ */
.about-content {
    animation: fadeInUp 0.8s ease 0.15s both;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all 0.3s ease;
}
.about-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: var(--shadow-glow);
}

.about-card-icon {
    width: 56px; height: 56px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    margin-bottom: 20px;
}

.about-card h3 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    margin-bottom: 12px;
}
.about-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Tech Section */
.tech-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 28px;
    color: var(--accent-cyan);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.tech-item {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px;
    text-align: center;
}
.tech-label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.tech-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-cyan);
    font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 40px 24px;
}

.footer-inner {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
}

.footer-logo {
    height: 36px;
    width: auto;
    margin-bottom: 8px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}
.footer-links a {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent-cyan); }

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius-sm);
    color: var(--accent-green);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.2);
    z-index: 9999;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }

    .features { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }

    .tool-card { padding: 24px 20px; }
    .hero-title { font-size: clamp(1.6rem, 8vw, 2.5rem); }

    .lang-dropdown {
        right: -60px;
        width: 280px;
    }
}

@media (max-width: 480px) {
    .tech-grid { grid-template-columns: 1fr; }
    .lang-dropdown {
        position: fixed;
        top: var(--nav-height);
        right: 0;
        left: 0;
        width: 100%;
        border-radius: 0 0 var(--radius) var(--radius);
    }
    .lang-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Selection */
::selection {
    background: rgba(0, 212, 255, 0.25);
    color: #fff;
}