/* --- 1. THEME VARIABLES --- */
:root {
    --teal: #008080;        /* Primary accent color */
    --bg-blue: #0a0e14;     /* Main background: Midnight Blue */
    --header-gray: #161b22; /* Navigation background: Slate Gray */
    --card-gray: #1c2128;   /* Component background: Dark Gray */
    --white: #adbac7;       /* Primary text color (soft white) */
    --bright-white: #ffffff;/* Heading color */
    --log-green: #00ff41;   /* Terminal text color */
}

/* --- 2. CORE RESET & BODY --- */
body {
    font-family: 'Segoe UI', Roboto, -apple-system, sans-serif;
    margin: 0;
    background-color: var(--bg-blue);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden; /* Prevents unwanted horizontal scrolling */
}

/* --- 3. NAVIGATION (STICKY TABS) --- */
header {
    background-color: var(--header-gray);
    padding: 5px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--teal);
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}

nav {
    display: flex;
    overflow-x: auto; /* Enable swipe for tabs on mobile */
    scrollbar-width: none; /* Firefox: hide scrollbar */
    padding: 0 10px;
}

nav::-webkit-scrollbar { display: none; } /* Chrome/Safari: hide scrollbar */

.tab-btn {
    background: none;
    border: none;
    color: #6e7681;
    font-size: 0.9rem;
    padding: 15px 20px;
    cursor: pointer;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    border-bottom: 3px solid transparent;
    transition: color 0.3s, border-bottom 0.3s;
}

.tab-btn:hover {
    color: var(--white);
}

.tab-btn.active {
    color: var(--teal);
    border-bottom: 3px solid var(--teal);
}

/* --- 4. DASHBOARD & WIDGETS --- */
.dashboard {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-bottom: 1px solid #30363d;
}

.widget-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
    max-width: 1200px;
    margin: auto;
}

.widget {
    background: var(--card-gray);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #30363d;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.widget-label {
    font-size: 0.7rem;
    color: var(--teal);
    letter-spacing: 2px;
    margin-bottom: 8px;
    font-weight: bold;
}

#clock, #session-timer {
    font-size: 2.2rem;
    font-family: 'Courier New', monospace;
    color: var(--teal);
}

.spec-list {
    text-align: left;
    font-family: monospace;
    font-size: 0.8rem;
    display: inline-block;
    margin: 0 auto;
}

.spec-list div {
    margin: 2px 0;
}

.spec-list span {
    color: var(--teal);
}

/* --- 5. SYSTEM LOG (TERMINAL) --- */
.system-log {
    max-width: 1200px;
    margin: 20px auto 0;
    background: #000;
    border: 1px solid #30363d;
    border-radius: 5px;
    padding: 15px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    box-shadow: inset 0 0 10px rgba(0, 255, 65, 0.1);
}

.log-header {
    color: var(--teal);
    border-bottom: 1px solid #222;
    margin-bottom: 10px;
    padding-bottom: 5px;
    font-weight: bold;
}

.log-entry {
    margin: 5px 0;
    color: var(--log-green);
}

.log-time {
    color: #58a6ff;
    margin-right: 10px;
}

/* Blinking cursor animation */
.cursor {
    display: inline-block;
    width: 8px;
    height: 15px;
    background: var(--teal);
    animation: blink 1s infinite;
    vertical-align: middle;
}
@keyframes blink { 50% { opacity: 0; } }

/* --- 6. MAIN CONTENT SECTIONS --- */
.content-section {
    display: none; /* JS handles visibility */
    padding: 40px 20px;
    max-width: 1000px;
    margin: auto;
    animation: fadeIn 0.4s ease-in;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

h1, h2, h3 {
    color: var(--bright-white);
}

/* Project/Automation Cards */
.placeholder-card {
    background: var(--card-gray);
    padding: 30px;
    border-left: 5px solid var(--teal);
    margin-bottom: 20px;
    border-radius: 0 8px 8px 0;
    border-top: 1px solid #30363d;
    border-right: 1px solid #30363d;
    border-bottom: 1px solid #30363d;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.7rem;
    background: #21262d;
    color: #8b949e;
    border: 1px solid #30363d;
    margin-bottom: 10px;
    text-transform: uppercase;
    font-weight: bold;
}

/* --- 7. FORMS & CONTACT --- */
input, textarea, button {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #30363d;
    border-radius: 6px;
    box-sizing: border-box;
    background: #0d1117;
    color: white;
    font-size: 1rem;
}

textarea {
    resize: vertical;
}

button {
    background: var(--teal);
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: filter 0.2s, transform 0.1s;
}

button:hover {
    filter: brightness(1.2);
}

button:active {
    transform: scale(0.98);
}

/* --- 8. RESPONSIVE ADJUSTMENTS --- */
@media (min-width: 768px) {
    nav {
        justify-content: center;
    }
    
    .widget-grid {
        grid-template-columns: repeat(3, 1fr); /* 3 widgets across on desktop */
    }
}