/* =========================================
   GIAO DIỆN SOFT NEO-BRUTALISM (PASTEL)
========================================= */
:root {
    --border-soft: 2px solid #2d3142;
    --shadow-soft: 4px 4px 0px rgba(45, 49, 66, 0.8);
    --shadow-soft-hover: 2px 2px 0px rgba(45, 49, 66, 0.8);
    
    --clr-bg: #faf9f6;        
    --clr-surface: #ffffff;   
    --clr-primary: #8fb8ed;   /* Xanh dương nhạt */
    --clr-secondary: #f2cc8f; /* Vàng nhạt */
    --clr-purple: #c8b6ff;    /* Tím nhạt */
    --clr-success: #81b29a;   /* Xanh rêu/ngọc nhạt */
    --clr-text: #2d3142;      
}

.resize-soft-wrapper {
    max-width: 800px;
    margin: 0 auto;
    font-family: system-ui, -apple-system, sans-serif;
    color: var(--clr-text);
    background: var(--clr-bg);
    padding: 25px;
    border: var(--border-soft);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
}

.resize-soft-wrapper * { box-sizing: border-box; }

/* Header */
.resize-soft-header {
    background: var(--clr-surface);
    padding: 20px;
    border: var(--border-soft);
    border-radius: 12px;
    text-align: center;
    margin-bottom: 25px;
    box-shadow: var(--shadow-soft);
}
.resize-soft-header h2 { margin: 0 0 8px 0; font-size: 1.8rem; font-weight: 800; }
.resize-soft-header p { margin: 0; font-weight: 500; font-size: 1rem; color: #555;}

/* Upload Area */
.upload-label {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 15px; background: var(--clr-purple); padding: 50px 20px;
    border: 2px dashed var(--clr-text); border-radius: 12px; cursor: pointer; transition: all 0.2s ease;
}
.upload-label:hover { background: #b8a2f8; transform: translateY(-2px); box-shadow: var(--shadow-soft); border-style: solid; }
.upload-icon { font-size: 3.5rem; }
.upload-text { font-size: 1.15rem; font-weight: 700; }

/* Editor & Preview Area */
.editor-section { display: flex; flex-direction: column; gap: 20px; }

.preview-container {
    width: 100%; max-height: 400px; background: #e9ecef;
    border: var(--border-soft); border-radius: 12px; display: flex; align-items: center; justify-content: center;
    padding: 15px; box-shadow: inset 2px 2px 5px rgba(0,0,0,0.08); overflow: hidden;
}
#resize-preview { max-width: 100%; max-height: 370px; border-radius: 6px; box-shadow: 0 4px 10px rgba(0,0,0,0.15); object-fit: contain; }

/* Control Grid */
.resize-controls-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 20px; }

.control-box { background: var(--clr-surface); border: var(--border-soft); border-radius: 12px; padding: 20px; box-shadow: var(--shadow-soft); }
.box-title { margin: 0 0 15px 0; font-size: 1rem; font-weight: 800; text-transform: uppercase; border-bottom: 2px dashed #eee; padding-bottom: 8px;}

/* Size Inputs */
.size-info { font-size: 0.95rem; margin-bottom: 15px; color: #555;}
.size-info strong { color: var(--clr-text); font-size: 1.1rem; background: #eee; padding: 2px 8px; border-radius: 6px;}

.dimension-inputs { display: flex; align-items: flex-end; gap: 10px; }
.input-group { flex: 1; display: flex; flex-direction: column; gap: 5px; }
.input-group label { font-size: 0.9rem; font-weight: 700; }

.input-with-unit { display: flex; align-items: center; border: var(--border-soft); border-radius: 8px; background: #fff; overflow: hidden; box-shadow: inset 2px 2px 0px rgba(0,0,0,0.05);}
.input-with-unit input { width: 100%; border: none; padding: 10px; font-size: 1.1rem; font-weight: 700; font-family: monospace, system-ui; outline: none; }
.input-with-unit span { padding: 10px; background: #eee; border-left: var(--border-soft); font-weight: 700; font-size: 0.9rem;}

/* Nút Khóa tỷ lệ */
.lock-btn { width: 45px; height: 45px; margin-bottom: 2px; font-size: 1.2rem; background: var(--clr-bg); border: var(--border-soft); border-radius: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.2s; opacity: 0.5;}
.lock-btn.active { opacity: 1; background: var(--clr-text); color: #fff; box-shadow: 2px 2px 0px rgba(45, 49, 66, 0.5); }

/* Quick Size Buttons */
.quick-size-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.quick-btn { padding: 10px; font-weight: 700; font-size: 0.9rem; background: var(--clr-bg); color: var(--clr-text); border: var(--border-soft); border-radius: 8px; cursor: pointer; transition: all 0.15s ease; }
.quick-btn:hover { background: var(--clr-primary); transform: translateY(-2px); box-shadow: 2px 2px 0px rgba(45, 49, 66, 0.5); }

/* Action Bar */
.action-bar { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 10px;}
.action-btn { padding: 14px 18px; font-size: 0.95rem; font-weight: 700; background: var(--clr-surface); color: var(--clr-text); border: var(--border-soft); border-radius: 10px; box-shadow: var(--shadow-soft); cursor: pointer; transition: all 0.15s ease; }
.action-btn:active { transform: translate(2px, 2px); box-shadow: var(--shadow-soft-hover); }
.btn-change { background: var(--clr-secondary); }

.btn-primary-soft { flex: 1; min-width: 200px; padding: 16px 20px; font-size: 1.1rem; font-weight: 800; background: var(--clr-success); color: var(--clr-text); border: var(--border-soft); border-radius: 10px; box-shadow: var(--shadow-soft); cursor: pointer; text-transform: uppercase; text-align: center; text-decoration: none; transition: all 0.15s ease; }
.btn-primary-soft:active { transform: translate(2px, 2px); box-shadow: var(--shadow-soft-hover); }

@media (max-width: 700px) {
    .resize-controls-grid { grid-template-columns: 1fr; }
    .dimension-inputs { flex-wrap: wrap; }
    .lock-btn { width: 100%; margin: 5px 0; }
    .action-bar { flex-direction: column; align-items: stretch; }
    .btn-primary-soft { text-align: center; }
}