/* --- General Setup --- */
:root {
    --bg-dark: #1a1a1d;     /* Deep charcoal background */
    --card-bg: #2d2d30;     /* Lighter metal color for card */
    --text-color: #e0e0e0;
    --accent-green: #28a745; /* For plus button */
    --accent-red: #dc3545;   /* For main add button */
    --btn-grey: #495057;    /* For general buttons */
}

body {
    margin: 0;
    padding: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark); /* Video jaisa dark background */
    color: var(--text-color);
}

/* --- Header & Grid Layout (Responsive) --- */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid #333;
    padding-bottom: 15px;
}

.counters-grid {
    display: grid;
    /* Desktop par 3 columns, mobile par 1 column */
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

/* --- The Counter Card Design --- */
.counter-card {
    background-color: var(--card-bg);
    /* Metallic border look */
    border: 3px solid #3a3a3c; 
    border-radius: 12px;
    /* Shadow taake card utha hua lage */
    box-shadow: 5px 5px 15px rgba(0,0,0,0.5), inset 1px 1px 2px rgba(255,255,255,0.1);
    overflow: hidden;
    transition: transform 0.2s ease;
}

.counter-card:hover {
    /* Card par mouse jane se thora sa upar uthe */
    transform: translateY(-3px);
}

/* Card Header (Name and X button) */
.card-header {
    background: #222;
    padding: 10px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #111;
}

.counter-title {
    font-weight: bold;
    letter-spacing: 1px;
}

/* The Display Screen (White box) */
.counter-display-box {
    background-color: #e9ecef; /* White screen */
    color: #222; /* Black numbers */
    margin: 15px;
    padding: 10px;
    text-align: right;
    font-family: 'Courier New', monospace; /* Digital font style */
    font-size: 2.5rem;
    font-weight: bold;
    border-radius: 4px;
    border: 3px solid #ccc; /* Screen border inset look */
    box-shadow: inset 2px 2px 5px rgba(0,0,0,0.2);
}

/* --- Controls & Buttons --- */
.controls {
    padding: 0 15px 20px 15px;
}

/* Button styling to look like physical buttons with 3D effect */
.btn {
    border: none;
    padding: 12px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 6px;
    color: white;
    transition: all 0.1s;
    /* Subtle 3D border bottom */
    border-bottom: 4px solid rgba(0,0,0,0.3); 
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

/* === HOVER EFFECTS (Jaisa video main hai) === */
.btn:hover {
    filter: brightness(1.2); /* Thora chamakdar ho jaye */
    transform: translateY(2px); /* Thora niche dab jaye */
    border-bottom-width: 2px; /* Border patla ho jaye dabne par */
}
.btn:active {
    transform: translateY(4px); /* Click karne par poora dab jaye */
    border-bottom: none;
}

/* Specific Button Colors */
.btn-main-add {
    background-color: var(--accent-red); /* Top Red Button */
    padding: 10px 20px;
    font-size: 1.1rem;
}

.btn-plus {
    background-color: var(--accent-green); /* Green Plus */
    flex-grow: 1;
    font-size: 1.5rem;
}

.btn-minus {
    background-color: var(--btn-grey); /* Grey Minus */
    flex-grow: 1;
    font-size: 1.5rem;
}

.btn-reset, .btn-set-val, .btn-set-name {
    background-color: var(--btn-grey); /* Grey Action buttons */
    width: 100%;
    margin-top: 10px;
}

.btn-close {
    background: none;
    border: none;
    color: #888;
    font-size: 1.5rem;
    cursor: pointer;
}
.btn-close:hover { color: var(--accent-red); }

/* Layout utilities */
.main-actions { display: flex; gap: 10px; margin-bottom: 15px; }

/* Input fields for Set Value/Name */
.input-group {
    display: flex;
    gap: 5px;
    margin-top: 10px;
}
.input-group input {
    flex-grow: 1;
    padding: 8px;
    border-radius: 4px;
    border: 2px solid #444;
    background: #222;
    color: white;
}