:root {
    --primary-color: #0693e3;
    --secondary-color: #9b51e0;
    --bg-dark: #0a0a0a;
    --bg-card: #161616;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-color: rgba(6, 147, 227, 0.3);
    --border-radius: 12px;
}

body.light-mode {
    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: rgba(0, 0, 0, 0.1);
    --glow-color: rgba(6, 147, 227, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.site-header {
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header__logo { height: 40px; }
.site-header__title { font-size: 1.25rem; font-weight: 800; color: #fff; }
.site-header__subtitle { font-size: 0.85rem; color: var(--text-secondary); }
.site-header__actions { display: flex; gap: 0.75rem; align-items: center; }

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--primary-color); color: #fff; }
.btn--secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn--small { font-size: 0.85rem; }
.btn--icon { width: 40px; height: 40px; justify-content: center; border-radius: 50%; }

/* Configurator Engine */
.configurator-engine { padding: 4rem 0; }

.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.config-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.section-header h3 { font-size: 1.25rem; margin-bottom: 2rem; color: var(--primary-color); text-transform: uppercase; letter-spacing: 1px; }

.input-group { margin-bottom: 2rem; }
.input-group label { display: block; margin-bottom: 0.75rem; font-weight: 600; color: var(--text-secondary); font-size: 0.9rem; }

.form-select {
    width: 100%;
    padding: 1rem;
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
}

.technique-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.tech-btn {
    padding: 1rem;
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.tech-btn.active {
    border-color: var(--primary-color);
    background: rgba(6, 147, 227, 0.1);
    box-shadow: 0 0 15px var(--glow-color);
}

/* Dial Component */
.config-card--display {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.dial-container {
    position: relative;
    width: 250px;
    height: 250px;
}

.dial-svg { width: 100%; height: 100%; transform: rotate(-90deg); }

.dial-track { fill: none; stroke: var(--bg-dark); stroke-width: 12; }

.dial-fill {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 502.6;
    stroke-dashoffset: 250;
    transition: stroke-dashoffset 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 0 8px var(--primary-color));
}

.dial-content {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.voltage-number { font-size: 4rem; font-weight: 800; color: #fff; display: block; line-height: 1; }
.voltage-unit { font-size: 0.85rem; letter-spacing: 2px; color: var(--text-secondary); }

.recommendation-box { margin-top: 2rem; text-align: center; }
.recommendation-box p { font-size: 1.1rem; color: var(--text-primary); }

/* Breakdown Area */
.breakdown-area { margin-top: 2rem; }
.breakdown-card { background: var(--bg-card); padding: 2rem; border-radius: 20px; border: 1px solid var(--border-color); }
.breakdown-card h4 { margin-bottom: 1.5rem; font-size: 1.1rem; text-transform: uppercase; color: var(--text-secondary); }

.specs-list { display: flex; justify-content: space-around; gap: 2rem; flex-wrap: wrap; }
.spec-item { display: flex; flex-direction: column; gap: 0.5rem; }
.spec-label { font-size: 0.85rem; color: var(--text-secondary); }
.spec-val { font-size: 1.5rem; font-weight: 700; color: var(--primary-color); }

/* Footer */
.site-footer { background: #000; padding: 4rem 0; border-top: 1px solid var(--border-color); margin-top: 4rem; }
.site-footer__content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 2rem; margin-bottom: 3rem; }
.site-footer__logo { height: 60px; margin-bottom: 1rem; }
.site-footer__tagline { color: var(--text-secondary); max-width: 300px; }
.site-footer__bottom { text-align: center; border-top: 1px solid var(--border-color); padding-top: 2rem; color: var(--text-secondary); font-size: 0.9rem; }
.disclaimer { margin-top: 1rem; font-style: italic; font-size: 0.8rem; }

/* Modal */
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.9); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal-content { background: var(--bg-card); padding: 2.5rem; border-radius: 20px; max-width: 600px; width: 90%; border: 1px solid var(--primary-color); }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.modal-close { font-size: 2.5rem; cursor: pointer; color: var(--text-secondary); line-height: 1; }
.code-container { background: #000; padding: 1.5rem; border-radius: 12px; margin: 1.5rem 0; border: 1px solid var(--border-color); }
.embed-code-textarea { width: 100%; background: transparent; border: none; color: #4ade80; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; resize: none; height: 100px; outline: none; }
.email-input-group { display: flex; gap: 0.75rem; }
.email-input { flex: 1; padding: 0.75rem 1rem; border-radius: 10px; border: 2px solid var(--border-color); background: var(--bg-dark); color: #fff; }

@media (max-width: 768px) {
    .config-grid { grid-template-columns: 1fr; }
    .site-header__container { flex-direction: column; gap: 1rem; text-align: center; }
    .site-footer__content { flex-direction: column; text-align: center; }
    .specs-list { flex-direction: column; align-items: center; }
}