:root {
    --primary-color: #0f172a;
    --primary-hover: #1e293b;
    --accent: #3b82f6;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
}

/* HEADER */
.top-header {
    background: var(--card-bg);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.theme-select {
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* BUTTON */
.btn-primary {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
}

/* LAYOUT */
.app-container {
    display: flex;
    gap: 2rem;
    padding: 2rem 5%;
    max-width: 1400px;
    margin: auto;
}

.form-section {
    flex: 1;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
}

.preview-section {
    flex: 1.2;
}

/* FORM */
.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

input, textarea {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

/* RESUME */
.resume-preview {
    background: white;
    width: 100%;
    min-height: 842px;
    padding: 40px;
    overflow-x: auto;
}

/* ADS */
.top-ad, .sidebar-ad {
    width: 100%;
}

/* ========================= */
/* 📱 RESPONSIVE DESIGN */
/* ========================= */

@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
    }
}

@media (max-width: 768px) {

    html {
        font-size: 14px;
    }

    .top-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .header-controls {
        flex-wrap: wrap;
        justify-content: center;
    }

    .form-row {
        flex-direction: column;
    }

    .resume-preview {
        padding: 20px;
    }

    .btn-primary {
        width: 100%;
        padding: 1rem;
    }

    /* FIX 2-COLUMN TEMPLATE */
    .resume-preview > div {
        flex-direction: column !important;
    }

    .resume-preview > div > div {
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 13px;
    }
}