:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #64748b;
    --secondary-hover: #475569;
    --bg-color: #0c0e12;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success: #10b981;
    --glass-blur: blur(20px);
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.glass-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 10%, #1e1b4b 0%, #0c0e12 50%),
                radial-gradient(circle at 90% 90%, #312e81 0%, #0c0e12 50%);
    z-index: -1;
}

.app-container {
    max-width: 1000px;
    width: 95%;
    padding: 4rem 0 10rem 0;
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
}

.main-icon {
    width: 56px;
    height: 56px;
    color: var(--primary);
}

.pulse-soft {
    animation: pulse 4s ease-in-out infinite;
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 550px;
    line-height: 1.6;
    margin: 0 auto;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    padding: 3rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

/* Tabs */
.tab-switcher {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    background: rgba(0,0,0,0.2);
    padding: 0.5rem;
    border-radius: 1.25rem;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 0.75rem;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn.active {
    background: var(--primary);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: slideUp 0.4s ease-out;
}

/* CHMOD Calculator */
.chmod-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.chmod-controls {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.chmod-group label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 1rem;
}

.checkbox-group {
    background: rgba(0,0,0,0.2);
    padding: 1.5rem;
    border-radius: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.check-container {
    display: block;
    position: relative;
    padding-left: 2.25rem;
    cursor: pointer;
    font-size: 1rem;
    user-select: none;
    color: var(--text-primary);
}

.check-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 1.5rem;
    width: 1.5rem;
    background-color: rgba(255,255,255,0.1);
    border-radius: 0.4rem;
    border: 1px solid var(--border-color);
}

.check-container:hover input ~ .checkmark {
    background-color: rgba(99, 102, 241, 0.2);
}

.check-container input:checked ~ .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 0.45rem;
    top: 0.2rem;
    width: 0.4rem;
    height: 0.8rem;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.check-container input:checked ~ .checkmark:after {
    display: block;
}

.chmod-result {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.res-box {
    background: rgba(0,0,0,0.3);
    padding: 1.5rem;
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
}

.res-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: block;
}

.res-box h2 {
    font-family: 'Fira Code', monospace;
    font-size: 2.5rem;
    color: var(--primary);
}

.terminal-cmd {
    background: #1e293b;
    border-color: var(--primary);
    position: relative;
    padding-right: 4rem;
}

.terminal-cmd code {
    font-family: 'Fira Code', monospace;
    font-size: 1.25rem;
    color: var(--success);
}

.btn-copy {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

.btn-copy:hover { color: var(--primary); }

/* Commands Tab */
.search-box {
    position: relative;
    margin-bottom: 2rem;
}

.search-box i {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    padding: 1.25rem 1rem 1.25rem 3.5rem;
    border-radius: 1.5rem;
    color: white;
    font-size: 1.1rem;
    outline: none;
}

.cmd-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 1rem;
}

.cmd-item {
    background: rgba(255,255,255,0.03);
    padding: 1.5rem;
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.cmd-item:hover {
    background: rgba(99, 102, 241, 0.05);
    border-color: var(--primary);
}

.cmd-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.cmd-name {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

.cmd-cat {
    font-size: 0.75rem;
    background: rgba(255,255,255,0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    color: var(--text-secondary);
}

.cmd-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.cmd-ex {
    margin-top: 1rem;
    background: #000;
    padding: 1rem;
    border-radius: 0.75rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: #cbd5e1;
}

/* Nav Back */
.nav-back {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 2rem;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.6rem 1.25rem;
    border-radius: 3rem;
    border: 1px solid var(--border-color);
}

.back-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

/* Footer & Privacy */
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(to top, var(--bg-color) 60%, transparent);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    z-index: 10;
    pointer-events: none;
}

footer > * {
    pointer-events: auto;
}

.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(16, 185, 129, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--success);
    padding: 0.8rem 1.8rem;
    border-radius: 3rem;
    font-size: 0.85rem;
    border: 1px solid rgba(16, 185, 129, 0.2);
    font-weight: 500;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.75rem;
    opacity: 0.6;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.4)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.6)); transform: scale(1.05); }
}