/* កំណត់ពណ៌មូលដ្ឋាន (Light Mode) */
:root {
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-color: #1c1e21;
    --accent-color: #0084ff;
    --header-bg: #ffffff;
    --modal-bg: #ffffff;
}

/* កំណត់ពណ៌សម្រាប់ Dark Mode (🌜) */
body.dark-mode {
    --bg-color: #18191a;
    --card-bg: #242526;
    --text-color: #e4e6eb;
    --accent-color: #2e89ff;
    --header-bg: #242526;
    --modal-bg: #242526;
}

body { 
    font-family: 'Segoe UI', 'Kantumruy Pro', sans-serif; 
    background-color: var(--bg-color); 
    margin: 0; padding: 0; color: var(--text-color);
    transition: all 0.3s ease;
}

/* --- Header --- */
header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 5%; background: var(--header-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky; top: 0; z-index: 1000;
}

.logo-area { display: flex; align-items: center; gap: 12px; }
.logo-circle { 
    width: 45px; height: 45px; background: linear-gradient(135deg, #ffcc00, #ff9900); 
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    overflow: hidden; box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.logo-circle img { width: 100%; height: 100%; object-fit: cover; }
.logo-circle span { color: white; font-weight: bold; font-size: 24px; }

.header-tools { display: flex; align-items: center; gap: 15px; }

/* ប៊ូតុងប្តូរ 🌜/☀️ */
.theme-toggle {
    background: none; border: none; font-size: 24px; cursor: pointer;
    transition: transform 0.3s ease;
}
.theme-toggle:hover { transform: scale(1.2); }

/* --- Content Container & Grid --- */
.container { max-width: 600px; margin: 30px auto; padding: 0 20px; text-align: center; }
.tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }

.tool-card {
    background: var(--card-bg); border-radius: 20px; padding: 15px 5px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); position: relative;
    border: 1px solid rgba(0,0,0,0.02); transition: 0.3s;
}
.tool-card:hover { transform: translateY(-5px); border-color: var(--accent-color); }

.icon-box {
    width: 65px; height: 65px; background-color: var(--bg-color);
    border-radius: 18px; margin: 0 auto 10px; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.icon-box img { width: 100%; height: 100%; object-fit: cover; }
.icon-box i { font-size: 28px; opacity: 0.7; }
.tool-name { font-size: 13px; font-weight: 600; }

/* ប៊ូតុង Edit តូចនៅលើ Card */
.edit-btn {
    position: absolute; top: 5px; right: 5px; background: rgba(0,0,0,0.1);
    border: none; border-radius: 50%; width: 25px; height: 25px; cursor: pointer;
    color: var(--text-color); font-size: 10px;
}

/* --- Modals (Login & Admin) --- */
.modal {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.75); z-index: 2000; backdrop-filter: blur(8px);
}

.modal-content {
    background: var(--modal-bg); width: 85%; max-width: 350px;
    margin: 80px auto; padding: 30px; border-radius: 25px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.3); text-align: center;
}

.lock-icon { font-size: 50px; color: var(--accent-color); margin-bottom: 15px; }

input[type="text"], input[type="password"], input[type="file"] {
    width: 100%; padding: 12px; margin: 10px 0; border-radius: 12px;
    border: 1px solid #ddd; background: var(--bg-color); color: var(--text-color);
    box-sizing: border-box; font-size: 16px;
}

.modal-buttons { display: flex; gap: 10px; margin-top: 20px; }
.save-btn { background: var(--accent-color); color: white; border: none; flex: 2; padding: 12px; border-radius: 12px; cursor: pointer; font-weight: bold; }
.close-btn { background: #eee; color: #333; border: none; flex: 1; padding: 12px; border-radius: 12px; cursor: pointer; }

/* Admin Controls Buttons */
.add-new-btn, .edit-logo-btn {
    padding: 12px 20px; border-radius: 12px; border: none; cursor: pointer;
    font-weight: bold; margin: 5px; font-size: 14px; transition: 0.2s;
}
.add-new-btn { background: var(--accent-color); color: white; }
.edit-logo-btn { background: #ff9900; color: white; }

footer { padding: 40px; text-align: center; color: #888; font-size: 13px; }