/* GIAO DIỆN SOFT BRUTALISM - COLOR PALETTE GENERATOR */
.tool-container {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    max-width: 1100px; margin: 20px auto;
    border: 3px solid #111111; border-radius: 12px;
    box-shadow: 6px 6px 0px #111111; padding: 30px;
    background: #ffffff; color: #111111; box-sizing: border-box;
}

h2.tool-title {
    font-family: 'Montserrat', sans-serif; font-size: 2rem; text-align: center;
    text-transform: uppercase; margin-top: 0; margin-bottom: 20px; font-weight: 900;
}

.instruction-banner {
    background-color: #fdfd96; border: 3px dashed #111111; border-radius: 8px;
    padding: 12px; text-align: center; font-size: 1rem; margin-bottom: 25px;
}

/* --- KHU VỰC BẢNG MÀU (5 CỘT) --- */
.palette-workspace {
    display: flex; height: 400px; border: 3px solid #111111;
    border-radius: 12px; overflow: hidden; margin-bottom: 30px;
    box-shadow: 4px 4px 0px #111111;
}

.color-col {
    flex: 1; display: flex; flex-direction: column; justify-content: flex-end;
    align-items: center; padding-bottom: 20px; transition: flex 0.2s ease, background-color 0.3s;
    position: relative;
}
.color-col:hover { flex: 1.2; }

/* Hộp công cụ trên từng cột màu */
.col-tools {
    background-color: #ffffff; border: 3px solid #111111; border-radius: 8px;
    padding: 10px; display: flex; flex-direction: column; gap: 8px;
    align-items: center; box-shadow: 3px 3px 0px #111111;
    opacity: 0; transform: translateY(10px); transition: opacity 0.2s, transform 0.2s;
}
.color-col:hover .col-tools { opacity: 1; transform: translateY(0); }

/* Luôn hiện tools trên mobile hoặc khi khóa */
.color-col.is-locked .col-tools { opacity: 1; transform: translateY(0); }

.hex-label {
    font-family: 'Montserrat', monospace; font-weight: 900; font-size: 1.1rem;
    text-transform: uppercase; cursor: pointer; transition: color 0.1s;
}
.hex-label:hover { color: #2d7bb5; }

.col-btn {
    background: none; border: 2px solid #111111; border-radius: 6px; cursor: pointer;
    width: 35px; height: 35px; display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; background-color: #f4f4f4; transition: transform 0.1s, box-shadow 0.1s;
}
.col-btn:active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px #111111; }
.btn-lock.locked { background-color: #ffb7b2; } /* Đỏ nhạt khi khóa */

/* --- KHU VỰC ĐIỀU KHIỂN DƯỚI --- */
.controls-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.control-card {
    background-color: #f9f9f9; border: 3px solid #111111; border-radius: 8px;
    padding: 20px; box-shadow: 4px 4px 0px #111111; display: flex; flex-direction: column; justify-content: space-between;
}
.control-card h4 { margin: 0 0 15px 0; font-family: 'Montserrat', sans-serif; font-size: 1.1rem; }
.control-card small { color: #666; font-size: 0.85rem; margin-top: 10px; display: block; }

.rule-inputs { display: flex; gap: 10px; }
.rule-inputs input[type="color"] {
    width: 50px; height: 45px; padding: 0; border: 3px solid #111111;
    border-radius: 6px; cursor: pointer; box-shadow: 2px 2px 0px #111111;
}
.rule-inputs select {
    flex: 1; padding: 0 10px; font-family: 'Inter', sans-serif; font-weight: 700;
    border: 3px solid #111111; border-radius: 6px; box-shadow: 2px 2px 0px #111111; outline: none;
}
.btn-generate-rule {
    background-color: #b5ead7; font-family: 'Montserrat', sans-serif; font-weight: 900;
    border: 3px solid #111111; border-radius: 6px; padding: 0 15px; cursor: pointer; box-shadow: 2px 2px 0px #111111;
}
.btn-generate-rule:active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px #111111; }

.export-buttons { display: flex; gap: 10px; }
.btn-export {
    flex: 1; background-color: #e6f7ff; font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 0.9rem;
    border: 3px solid #111111; border-radius: 6px; padding: 12px 10px; cursor: pointer; box-shadow: 2px 2px 0px #111111; transition: transform 0.1s;
}
.btn-export:active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px #111111; }

.mobile-action-bar { display: none; margin-top: 20px; }
.btn-space-mobile {
    width: 100%; background-color: #ffdac1; font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 1.2rem;
    border: 3px solid #111111; border-radius: 8px; padding: 15px; cursor: pointer; box-shadow: 4px 4px 0px #111111;
}
.btn-space-mobile:active { transform: translate(4px, 4px); box-shadow: 0px 0px 0px #111111; }

/* Toast */
#toastPalette {
    visibility: hidden; min-width: 200px; background-color: #111111; color: #ffffff;
    text-align: center; border-radius: 8px; padding: 12px; position: fixed;
    z-index: 9999; bottom: 30px; left: 50%; transform: translateX(-50%);
    font-weight: bold; opacity: 0; transition: opacity 0.3s, bottom 0.3s;
}
#toastPalette.show { visibility: visible; opacity: 1; bottom: 50px; }

/* Responsive Mobile */
@media (max-width: 800px) {
    .controls-grid { grid-template-columns: 1fr; }
    .export-buttons { flex-direction: column; }
    .instruction-banner { display: none; } /* Ẩn banner space trên đt */
    .mobile-action-bar { display: block; } /* Hiện nút thay cho phím space */
    
    .palette-workspace { flex-direction: column; height: 600px; }
    .color-col { flex-direction: row; justify-content: space-between; padding: 0 20px; }
    .color-col:hover { flex: 1; } /* Tắt hiệu ứng co giãn trên đt */
    .col-tools { flex-direction: row; opacity: 1; transform: translateY(0); padding: 5px 15px; }
}
/* GIAO DIỆN SOFT BRUTALISM - COLOR PALETTE GENERATOR (BẢN UPDATE TRENDING) */
.tool-container {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    max-width: 1100px; margin: 20px auto;
    border: 3px solid #111111; border-radius: 12px;
    box-shadow: 6px 6px 0px #111111; padding: 30px;
    background: #ffffff; color: #111111; box-sizing: border-box;
}

h2.tool-title {
    font-family: 'Montserrat', sans-serif; font-size: 2rem; text-align: center;
    text-transform: uppercase; margin-top: 0; margin-bottom: 20px; font-weight: 900;
}

.instruction-banner {
    background-color: #fdfd96; border: 3px dashed #111111; border-radius: 8px;
    padding: 12px; text-align: center; font-size: 1rem; margin-bottom: 25px;
}

/* --- KHU VỰC BẢNG MÀU CHÍNH --- */
.palette-workspace {
    display: flex; height: 400px; border: 3px solid #111111;
    border-radius: 12px; overflow: hidden; margin-bottom: 30px;
    box-shadow: 4px 4px 0px #111111;
}

.color-col {
    flex: 1; display: flex; flex-direction: column; justify-content: flex-end;
    align-items: center; padding-bottom: 20px; transition: flex 0.2s ease, background-color 0.3s;
    position: relative;
}
.color-col:hover { flex: 1.2; }

.col-tools {
    background-color: #ffffff; border: 3px solid #111111; border-radius: 8px;
    padding: 10px; display: flex; flex-direction: column; gap: 8px;
    align-items: center; box-shadow: 3px 3px 0px #111111;
    opacity: 0; transform: translateY(10px); transition: opacity 0.2s, transform 0.2s;
}
.color-col:hover .col-tools, .color-col.is-locked .col-tools { opacity: 1; transform: translateY(0); }

.hex-label {
    font-family: 'Montserrat', monospace; font-weight: 900; font-size: 1.1rem;
    text-transform: uppercase; cursor: pointer; transition: color 0.1s;
}
.hex-label:hover { color: #2d7bb5; }

.col-btn {
    background: none; border: 2px solid #111111; border-radius: 6px; cursor: pointer;
    width: 35px; height: 35px; display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; background-color: #f4f4f4; transition: transform 0.1s, box-shadow 0.1s;
}
.col-btn:active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px #111111; }
.btn-lock.locked { background-color: #ffb7b2; }

/* --- KHU VỰC ĐIỀU KHIỂN DƯỚI --- */
.controls-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.control-card {
    background-color: #f9f9f9; border: 3px solid #111111; border-radius: 8px;
    padding: 20px; box-shadow: 4px 4px 0px #111111; display: flex; flex-direction: column; justify-content: space-between;
}
.control-card h4 { margin: 0 0 15px 0; font-family: 'Montserrat', sans-serif; font-size: 1.1rem; }
.control-card small { color: #666; font-size: 0.85rem; margin-top: 10px; display: block; }

.rule-inputs { display: flex; gap: 10px; }
.rule-inputs input[type="color"] {
    width: 50px; height: 45px; padding: 0; border: 3px solid #111111;
    border-radius: 6px; cursor: pointer; box-shadow: 2px 2px 0px #111111;
}
.rule-inputs select {
    flex: 1; padding: 0 10px; font-family: 'Inter', sans-serif; font-weight: 700;
    border: 3px solid #111111; border-radius: 6px; box-shadow: 2px 2px 0px #111111; outline: none;
}
.btn-generate-rule, .btn-export {
    font-family: 'Montserrat', sans-serif; font-weight: 900; border: 3px solid #111111;
    border-radius: 6px; cursor: pointer; box-shadow: 2px 2px 0px #111111; transition: transform 0.1s;
}
.btn-generate-rule { background-color: #b5ead7; padding: 0 15px; }
.btn-export { flex: 1; background-color: #e6f7ff; padding: 12px 10px; font-size: 0.9rem; }
.btn-generate-rule:active, .btn-export:active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px #111111; }

.export-buttons { display: flex; gap: 10px; }
.mobile-action-bar { display: none; margin-top: 20px; }
.btn-space-mobile {
    width: 100%; background-color: #ffdac1; font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 1.2rem;
    border: 3px solid #111111; border-radius: 8px; padding: 15px; cursor: pointer; box-shadow: 4px 4px 0px #111111;
}
.btn-space-mobile:active { transform: translate(4px, 4px); box-shadow: 0px 0px 0px #111111; }

/* --- KHU VỰC TRENDING PALETTES --- */
.trending-section { margin-top: 40px; padding-top: 30px; border-top: 3px dashed #111111; }
.trending-title { font-family: 'Montserrat', sans-serif; font-size: 1.4rem; font-weight: 900; margin-bottom: 5px; text-transform: uppercase; }
.trending-desc { color: #555; font-weight: 600; margin-bottom: 20px; }

.trending-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 20px; }

.trend-card {
    border: 3px solid #111111; border-radius: 8px; background-color: #fff;
    overflow: hidden; cursor: pointer; box-shadow: 3px 3px 0px #111111;
    transition: transform 0.2s, box-shadow 0.2s; display: flex; flex-direction: column;
}
.trend-card:hover { transform: translateY(-5px); box-shadow: 5px 5px 0px #111111; }
.trend-card:active { transform: translateY(0); box-shadow: 0px 0px 0px #111111; }

.trend-colors { display: flex; height: 60px; }
.trend-color-swatch { flex: 1; }

.trend-name { font-weight: 800; padding: 12px 10px; text-align: center; font-size: 0.95rem; border-top: 3px solid #111111; }

/* Toast */
#toastPalette {
    visibility: hidden; min-width: 200px; background-color: #111111; color: #ffffff;
    text-align: center; border-radius: 8px; padding: 12px; position: fixed;
    z-index: 9999; bottom: 30px; left: 50%; transform: translateX(-50%);
    font-weight: bold; opacity: 0; transition: opacity 0.3s, bottom 0.3s;
}
#toastPalette.show { visibility: visible; opacity: 1; bottom: 50px; }

@media (max-width: 800px) {
    .controls-grid { grid-template-columns: 1fr; }
    .export-buttons { flex-direction: column; }
    .instruction-banner { display: none; } 
    .mobile-action-bar { display: block; }
    .palette-workspace { flex-direction: column; height: 600px; }
    .color-col { flex-direction: row; justify-content: space-between; padding: 0 20px; }
    .color-col:hover { flex: 1; }
    .col-tools { flex-direction: row; opacity: 1; transform: translateY(0); padding: 5px 15px; }
    .trending-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
    .trending-grid { grid-template-columns: 1fr; }
}