/* ===========================================
   Virtual Keyboard - POS Kabas
   =========================================== */

/* Overlay container */
.virtual-keyboard-overlay {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: linear-gradient(to bottom, #e9ecef 0%, #d3d3d3 100%);
    border-top: 2px solid #adb5bd;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    padding: 8px 10px 12px;
    transform: translateY(100%);
    transition: transform 0.25s ease-out;
}

.virtual-keyboard-overlay.visible {
    transform: translateY(0);
}

/* Keyboard container */
.virtual-keyboard {
    max-width: 900px;
    margin: 0 auto;
}

/* Keyboard rows */
.vk-row {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 4px;
}

.vk-row:last-child {
    margin-bottom: 0;
}

/* Base key styles */
.vk-key {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    height: 48px;
    padding: 0 8px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #212529;
    background: linear-gradient(to bottom, #ffffff 0%, #f0f0f0 100%);
    border: 1px solid #c4c4c4;
    border-radius: 6px;
    box-shadow: 0 2px 3px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.8);
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: all 0.1s ease;
    flex: 1;
    max-width: 60px;
}

.vk-key:active,
.vk-key.active {
    background: linear-gradient(to bottom, #d0d0d0 0%, #e0e0e0 100%);
    box-shadow: inset 0 2px 3px rgba(0, 0, 0, 0.15);
    transform: translateY(1px);
}

/* Number row */
.vk-row-numbers .vk-key {
    background: linear-gradient(to bottom, #f8f9fa 0%, #e9ecef 100%);
}

/* Special keys */
.vk-key-shift {
    min-width: 65px;
    max-width: 80px;
    font-size: 1.3rem;
}

.vk-key-shift.active {
    background: linear-gradient(to bottom, #0d6efd 0%, #0b5ed7 100%);
    color: white;
    border-color: #0a58ca;
}

.vk-key-backspace {
    min-width: 65px;
    max-width: 80px;
    font-size: 1.3rem;
    background: linear-gradient(to bottom, #ffc107 0%, #e0a800 100%);
    border-color: #d39e00;
    color: #212529;
}

.vk-key-backspace:active {
    background: linear-gradient(to bottom, #e0a800 0%, #c69500 100%);
}

.vk-key-space {
    flex: 4;
    min-width: 180px;
    max-width: 300px;
}

.vk-key-enter {
    min-width: 70px;
    max-width: 90px;
    background: linear-gradient(to bottom, #198754 0%, #157347 100%);
    border-color: #146c43;
    color: white;
    font-size: 0.85rem;
}

.vk-key-enter:active {
    background: linear-gradient(to bottom, #146c43 0%, #13653f 100%);
}

/* Hide keyboard button */
.vk-hide-btn {
    display: block;
    width: 100%;
    max-width: 200px;
    margin: 8px auto 0;
    padding: 6px 16px;
    font-size: 0.85rem;
    font-weight: 500;
    color: #6c757d;
    background: transparent;
    border: 1px solid #adb5bd;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.vk-hide-btn:hover,
.vk-hide-btn:active {
    background: #6c757d;
    color: white;
    border-color: #6c757d;
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .vk-key {
        min-width: 36px;
        height: 52px;
        font-size: 1.2rem;
    }

    .vk-key-shift,
    .vk-key-backspace {
        min-width: 55px;
    }

    .vk-key-enter {
        min-width: 60px;
    }

    .vk-key-space {
        min-width: 140px;
    }

    .virtual-keyboard-overlay {
        padding: 6px 6px 10px;
    }

    .vk-row {
        gap: 3px;
        margin-bottom: 3px;
    }
}

/* Landscape mode on tablets */
@media (max-height: 500px) {
    .vk-key {
        height: 40px;
        font-size: 1rem;
    }

    .virtual-keyboard-overlay {
        padding: 4px 8px 8px;
    }
}

/* Large screens */
@media (min-width: 1200px) {
    .vk-key {
        min-width: 50px;
        height: 54px;
        font-size: 1.2rem;
    }

    .vk-row {
        gap: 6px;
        margin-bottom: 6px;
    }
}

/* Keyboard backdrop (optional dark overlay) */
.vk-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.vk-backdrop.visible {
    opacity: 1;
    visibility: visible;
}