:root {
    --bg-dark: #1a1c24;
    --card-bg: #252833;
    --input-bg: #f8f9fa;
    --blue-btn: #3b82f6;
    --green-btn: #22c55e;
    --text-white: #ffffff;
    --border-color: #333745;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 20px;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.tool-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    background: #333745;
    color: white;
    cursor: pointer;
}

.tab-btn.active { background: var(--blue-btn); }

/* GÖRSELDEKİ KART YAPISI */
.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
}

.preview-box {
    background: #eef2f7;
    border: 2px dashed #ccc;
    height: 250px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
}

.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 15px;
}

.input-group label { display: block; margin-bottom: 5px; font-size: 13px; color: #aaa; }

input, select {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ddd;
    background: white;
    color: #333;
}

/* İLERLEME ÇUBUĞU (GÖRSELDEKİ SARI/MAVİ) */
.progress-container {
    background: #12141a;
    height: 12px;
    border-radius: 20px;
    margin: 20px 0;
    overflow: hidden;
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #facc15, #3b82f6);
    transition: width 0.4s;
}

.process-btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    background: var(--green-btn);
    color: white;
}