/* =========================================
   MODERN SPLIT LAYOUT PREMIUM UI
========================================= */

:root{

    --primary:#6366f1;
    --secondary:#8b5cf6;

    --bg:#eef2ff;

    --card:
        rgba(255,255,255,0.72);

    --text:#111827;

    --muted:#6b7280;

    --border:
        rgba(255,255,255,0.6);

    --shadow:
        0 10px 40px rgba(99,102,241,0.10);
}

/* =========================================
   BODY
========================================= */

body{

    margin:0;

    font-family:
        Inter,
        sans-serif;

    background:
        radial-gradient(
            circle at top left,
            #dbeafe,
            transparent 28%
        ),

        radial-gradient(
            circle at bottom right,
            #ede9fe,
            transparent 30%
        ),

        linear-gradient(
            135deg,
            #f8fafc,
            #eef2ff
        );

    min-height:100vh;

    color:var(--text);
}

/* =========================================
   MAIN LAYOUT
========================================= */

.pdf-container{

    width:100%;

    padding:16px;
}

.pdf-card{

    max-width:1450px;

    margin:auto;

    display:grid;

    grid-template-columns:
        1fr 360px;

    gap:22px;
}

/* =========================================
   LEFT SIDE
========================================= */

.workspace{

    background:var(--card);

    backdrop-filter:blur(22px);

    border:
        1px solid var(--border);

    border-radius:32px;

    padding:24px;

    position:relative;

    overflow:hidden;

    box-shadow:var(--shadow);
}

/* GLOW */

.workspace::before{

    content:'';

    position:absolute;

    width:260px;
    height:260px;

    top:-120px;
    right:-120px;

    border-radius:50%;

    background:
        radial-gradient(
            rgba(99,102,241,0.14),
            transparent 70%
        );
}

/* =========================================
   RIGHT PANEL
========================================= */

.sidebar{

    background:var(--card);

    backdrop-filter:blur(22px);

    border:
        1px solid var(--border);

    border-radius:32px;

    padding:22px;

    height:fit-content;

    position:sticky;
    top:16px;

    box-shadow:var(--shadow);
}

/* =========================================
   TITLE
========================================= */

.top-section{

    text-align:center;

    margin-bottom:24px;
}

.tool-title{

    font-size:38px;
    font-weight:900;

    margin-bottom:8px;

    background:
        linear-gradient(
            90deg,
            var(--primary),
            var(--secondary)
        );

    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
}

.tool-subtitle{

    color:var(--muted);

    font-size:14px;

    line-height:1.6;

    max-width:620px;

    margin:auto;
}

/* =========================================
   TOP ACTIONS
========================================= */

.top-actions{

    display:flex;

    gap:14px;

    margin-bottom:20px;
}

.pdf-name-input{

    flex:1;

    height:56px;

    border:none;

    border-radius:18px;

    padding:0 18px;

    background:
        rgba(255,255,255,0.85);

    font-size:15px;

    font-weight:600;

    outline:none;

    box-shadow:
        0 4px 14px rgba(0,0,0,0.04);
}

.pdf-name-input:focus{

    box-shadow:
        0 0 0 4px rgba(99,102,241,0.12);
}

/* =========================================
   ACTION BUTTONS WRAPPER
========================================= */

.action-buttons{

    display:flex;

    gap:14px;

    margin-top:18px;
}

/* =========================================
   COMMON BUTTON STYLE
========================================= */

.rotate-btn,
.clear-btn{

    flex:1;

    height:56px;

    border:none;

    border-radius:18px;

    display:flex;
    justify-content:center;
    align-items:center;
    gap:10px;

    font-size:15px;
    font-weight:800;

    cursor:pointer;

    position:relative;

    overflow:hidden;

    transition:
        transform .28s ease,
        box-shadow .28s ease,
        opacity .28s ease;

    letter-spacing:.3px;

    backdrop-filter:blur(10px);
}

/* SHINE EFFECT */

.rotate-btn::before,
.clear-btn::before{

    content:'';

    position:absolute;

    top:0;
    left:-120%;

    width:70%;
    height:100%;

    background:
        linear-gradient(
            120deg,
            transparent,
            rgba(255,255,255,0.35),
            transparent
        );

    transition:.8s;
}

.rotate-btn:hover::before,
.clear-btn:hover::before{

    left:140%;
}

/* =========================================
   ROTATE BUTTON
========================================= */

.rotate-btn{

    color:#fff;

    background:
        linear-gradient(
            135deg,
            #0ea5e9,
            #2563eb
        );

    box-shadow:
        0 10px 22px
        rgba(37,99,235,0.22);
}

.rotate-btn:hover{

    transform:
        translateY(-3px);

    box-shadow:
        0 16px 34px
        rgba(37,99,235,0.30);
}

.rotate-btn:active{

    transform:scale(.98);
}

/* =========================================
   CLEAR BUTTON
========================================= */

.clear-btn{

    color:#fff;

    background:
        linear-gradient(
            135deg,
            #ef4444,
            #dc2626
        );

    box-shadow:
        0 10px 22px
        rgba(239,68,68,0.22);
}

.clear-btn:hover{

    transform:
        translateY(-3px);

    box-shadow:
        0 16px 34px
        rgba(239,68,68,0.30);
}

.clear-btn:active{

    transform:scale(.98);
}

/* =========================================
   DISABLED STATE
========================================= */

.rotate-btn:disabled,
.clear-btn:disabled{

    opacity:.6;

    cursor:not-allowed;

    transform:none;
}

/* =========================================
   MOBILE
========================================= */

@media(max-width:768px){

    .action-buttons{

        flex-direction:column;
    }

    .rotate-btn,
    .clear-btn{

        width:100%;

        height:52px;

        border-radius:16px;

        font-size:14px;
    }
}

/* =========================================
   IMAGE ACTIONS
========================================= */

.image-actions{

    position:absolute;

    top:12px;
    left:12px;
    right:12px;

    display:flex;
    justify-content:space-between;

    z-index:10;
}

/* =========================================
   COMMON BUTTON STYLE
========================================= */

.single-rotate-btn,
.remove-btn{

    width:38px;
    height:38px;

    border:none;

    border-radius:50%;

    background:
        rgba(255,255,255,0.95);

    backdrop-filter:blur(10px);

    display:flex;
    justify-content:center;
    align-items:center;

    font-size:18px;
    font-weight:800;

    cursor:pointer;

    transition:.3s ease;

    box-shadow:
        0 6px 14px rgba(0,0,0,0.12);
}

/* =========================================
   ROTATE BUTTON
========================================= */

.single-rotate-btn{

    color:#2563eb;
}

.single-rotate-btn:hover{

    background:
        linear-gradient(
            135deg,
            #2563eb,
            #3b82f6
        );

    color:#fff;

    transform:
        rotate(90deg)
        scale(1.08);
}

/* =========================================
   REMOVE BUTTON
========================================= */

.remove-btn{

    color:#ef4444;
}

.remove-btn:hover{

    background:
        linear-gradient(
            135deg,
            #ef4444,
            #dc2626
        );

    color:#fff;

    transform:
        scale(1.08);
}

/* =========================================
   UPLOAD BOX
========================================= */

.upload-box{

    width:100%;

    min-height:240px;

    border:
        2px dashed rgba(99,102,241,0.32);

    border-radius:30px;

    display:flex;
    justify-content:center;
    align-items:center;
    flex-direction:column;

    background:
        linear-gradient(
            135deg,
            rgba(99,102,241,0.04),
            rgba(139,92,246,0.04)
        );

    cursor:pointer;

    transition:.35s;

    overflow:hidden;

    position:relative;

    margin-bottom:24px;
}

.upload-box:hover{

    border-color:var(--primary);

    transform:translateY(-3px);

    box-shadow:
        0 14px 30px rgba(99,102,241,0.10);
}

.upload-box::before{

    content:'';

    position:absolute;

    inset:0;

    background:
        linear-gradient(
            120deg,
            transparent,
            rgba(255,255,255,0.24),
            transparent
        );

    transform:translateX(-100%);

    transition:1s;
}

.upload-box:hover::before{

    transform:translateX(100%);
}

.upload-box input{
    display:none;
}

/* CONTENT */

.upload-content{

    text-align:center;

    position:relative;
    z-index:2;
}

.upload-icon{

    width:78px;
    height:78px;

    margin:auto auto 16px;

    border-radius:24px;

    background:
        linear-gradient(
            135deg,
            var(--primary),
            var(--secondary)
        );

    display:flex;
    justify-content:center;
    align-items:center;

    color:#fff;

    font-size:36px;

    box-shadow:
        0 12px 28px rgba(99,102,241,0.22);
}

.upload-content h3{

    font-size:26px;
    font-weight:800;

    margin-bottom:6px;
}

.upload-content p{

    color:var(--muted);

    font-size:14px;
}

/* =========================================
   INFO BAR
========================================= */

.info-bar{

    display:flex;

    gap:14px;

    margin-bottom:20px;
}

.image-count,
.total-size{

    flex:1;

    background:
        rgba(255,255,255,0.75);

    border:
        1px solid rgba(255,255,255,0.7);

    border-radius:18px;

    padding:14px 16px;

    font-size:14px;
    font-weight:800;

    box-shadow:
        0 4px 14px rgba(0,0,0,0.04);
}

.image-count span,
.total-size span{

    color:var(--primary);
}

/* =========================================
   PREVIEW GRID
========================================= */

.preview-grid{

    display:grid;

    grid-template-columns:
        repeat(auto-fill,minmax(200px,1fr));

    gap:18px;
}

/* CARD */

.preview-card{

    background:#fff;

    border-radius:8px;

    overflow:hidden;

    position:relative;

    transition:.35s;

    border:
        1px solid rgba(226,232,240,0.8);

    box-shadow:
        0 6px 18px rgba(0,0,0,0.04);
}

.preview-card:hover{

    transform:
        translateY(-6px);

    box-shadow:
        0 18px 34px rgba(99,102,241,0.14);
}

/* IMAGE */

.preview-img{

    width:100%;
    height:230px;
    margin-bottom: 5px;

    object-fit:cover;

    display:block;
}

/* REMOVE BTN */

.remove-btn{

    position:absolute;

    top:12px;
    right:12px;

    width:36px;
    height:36px;

    border:none;

    border-radius:50%;

    background:
        rgba(255,255,255,0.95);

    color:#ef4444;

    font-size:18px;
    font-weight:800;

    cursor:pointer;

    transition:.25s;

    box-shadow:
        0 4px 12px rgba(0,0,0,0.08);
}

.remove-btn:hover{

    background:#ef4444;

    color:#fff;

    transform:scale(1.08);
}

/* =========================================
   SIDEBAR
========================================= */

.sidebar-title{

    font-size:24px;
    font-weight:900;

    margin-bottom:20px;
}

/* SETTINGS CARD */

.setting-card{

    background:
        rgba(255,255,255,0.72);

    border:
        1px solid rgba(255,255,255,0.7);

    border-radius:22px;

    padding:18px;

    margin-bottom:16px;

    box-shadow:
        0 4px 16px rgba(0,0,0,0.04);
}

.setting-card label{

    display:block;

    margin-bottom:10px;

    font-size:13px;
    font-weight:800;
}

.setting-card select{

    width:100%;

    height:50px;

    border:none;

    border-radius:14px;

    padding:0 14px;

    background:#fff;

    outline:none;

    font-weight:600;
}

/* =========================================
   CONVERT BUTTON
========================================= */

.convert-btn{

    width:100%;

    border:none;

    padding:18px;

    border-radius:22px;

    background:
        linear-gradient(
            90deg,
            var(--primary),
            var(--secondary)
        );

    color:#fff;

    font-size:18px;
    font-weight:800;

    cursor:pointer;

    transition:.35s;

    margin-top:10px;

    box-shadow:
        0 14px 28px rgba(99,102,241,0.22);
}

.convert-btn:hover{

    transform:
        translateY(-3px);

    box-shadow:
        0 18px 38px rgba(99,102,241,0.28);
}

/* =========================================
   MOBILE
========================================= */

@media(max-width:1100px){

    .pdf-card{

        grid-template-columns:1fr;
    }

    .sidebar{

        position:static;
    }
}

@media(max-width:768px){

    .workspace,
    .sidebar{

        padding:16px;

        border-radius:24px;
    }

    .tool-title{
        font-size:30px;
    }

    .top-actions{
        flex-direction:column;
    }

    .upload-box{
        min-height:190px;
    }

    .preview-grid{

        grid-template-columns:
            repeat(auto-fill,minmax(145px,1fr));

        gap:14px;
    }

    .preview-img{
        height:170px;
    }

    .info-bar{
        flex-direction:column;
    }
}