/* ==========================================================================
   GHOUSIA ENERGY SOLUTIONS — SOLAR SYSTEM DESIGNER
   Page-specific stylesheet: assets/css/solar-designer.css
   Aesthetic: Apple × Siemens Energy × Modern Industrial Control Room
   Inherits design tokens and variables from premium-home.css
   ========================================================================== */

/* ── 01. STEPS PROGRESS BAR ────────────────────────────────────────────── */
.sd-progress-bar {
    position: sticky;
    top: 74px;
    z-index: 900;
    background: rgba(8, 11, 14, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-dark);
    padding: 18px 0;
    transition: all 0.3s ease;
}

.sd-progress-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.sd-progress-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.sd-progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    position: relative;
    z-index: 2;
    background: transparent;
    border: none;
    padding: 0;
}

.sd-step-circle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg-dark-card);
    border: 1.5px solid var(--border-dark);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s var(--ease-out-expo);
}

.sd-progress-step:hover .sd-step-circle {
    border-color: rgba(0, 230, 118, 0.4);
    color: #fff;
    transform: translateY(-1px);
}

.sd-progress-step.sd-active .sd-step-circle {
    background: var(--green-forest);
    border-color: var(--green-accent);
    color: var(--green-accent);
    box-shadow: 0 0 20px rgba(0, 230, 118, 0.3);
}

.sd-progress-step.sd-completed .sd-step-circle {
    background: var(--green-accent);
    border-color: var(--green-accent);
    color: #080b0e;
    font-weight: 700;
}

.sd-step-label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.sd-progress-step.sd-active .sd-step-label {
    color: var(--green-accent);
}

.sd-progress-step.sd-completed .sd-step-label {
    color: var(--text-light);
}

/* Connector bar between steps */
.sd-steps-track {
    position: absolute;
    top: 19px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: rgba(255, 255, 255, 0.08);
    z-index: 1;
}

.sd-steps-track-fill {
    height: 100%;
    background: var(--green-accent);
    width: 0%;
    transition: width 0.4s var(--ease-out-expo);
    box-shadow: 0 0 10px rgba(0, 230, 118, 0.4);
}

/* ── 02. CALCULATOR SHELL & STEP PANELS ──────────────────────────────────── */
.sd-calculator-section {
    background-color: var(--bg-dark);
    padding: 60px 0 120px;
    min-height: 80vh;
    position: relative;
}

.sd-calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.sd-step-panel {
    display: none;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s var(--ease-out-expo), transform 0.4s var(--ease-out-expo);
}

.sd-step-panel.sd-active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.sd-calculator-card {
    background: var(--bg-dark-card);
    border: 1px solid var(--border-dark);
    border-radius: 8px;
    padding: 48px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
    position: relative;
}

.sd-step-header {
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border-dark);
    padding-bottom: 24px;
}

/* ── 03. LOAD INPUT TABLE ────────────────────────────────────────────────── */
.sd-load-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    background: rgba(8, 11, 14, 0.6);
    margin-bottom: 20px;
}

.sd-load-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

.sd-load-table th {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border-dark);
    white-space: nowrap;
}

.sd-load-table td {
    padding: 10px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-light);
    vertical-align: middle;
}

.sd-load-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.sd-load-table .form-input-control {
    padding: 8px 12px;
    font-size: 13.5px;
    font-family: var(--font-mono);
}

.sd-table-add-row-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
    border: 1px dashed var(--border-dark);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.25s ease;
}

.sd-table-add-row-btn:hover {
    border-color: var(--green-accent);
    color: var(--green-accent);
    background: rgba(0, 230, 118, 0.05);
}

.sd-row-delete-btn {
    background: transparent;
    border: none;
    color: #ef4444;
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: all 0.2s ease;
}

.sd-row-delete-btn:hover {
    opacity: 1;
    background: rgba(239, 68, 68, 0.15);
}

.sd-custom-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--green-accent);
    cursor: pointer;
}

/* ── 04. TELEMETRY DISPLAY ROW ───────────────────────────────────────────── */
.sd-telemetry-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    padding: 20px;
    background: rgba(8, 11, 14, 0.8);
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    margin: 20px 0;
}

.sd-telem-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sd-telem-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.sd-telem-value {
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.1;
}

.sd-telem-unit {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--green-accent);
    margin-top: 2px;
}

/* ── 05. SYSTEM SELECTOR CARDS (STEP 04) ─────────────────────────────────── */
.sd-system-selector-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 24px 0;
}

.sd-system-card {
    background: var(--bg-dark-card);
    border: 1.5px solid var(--border-dark);
    border-radius: 8px;
    padding: 32px 24px;
    cursor: pointer;
    transition: all 0.35s var(--ease-out-expo);
    display: flex;
    flex-direction: column;
    position: relative;
    user-select: none;
}

.sd-system-card:hover {
    border-color: var(--border-dark-hover);
    transform: translateY(-4px);
    background: var(--bg-dark-elevated);
}

.sd-system-card.sd-selected {
    border-color: var(--green-accent);
    background: var(--bg-dark-elevated);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 25px rgba(0, 230, 118, 0.12);
}

.sd-system-card.sd-selected::after {
    content: "ACTIVE CONFIG";
    position: absolute;
    top: 14px;
    right: 14px;
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.14em;
    padding: 4px 8px;
    background: rgba(0, 230, 118, 0.15);
    color: var(--green-accent);
    border: 1px solid var(--green-accent);
    border-radius: 3px;
}

.sd-system-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 6px;
    background: rgba(0, 230, 118, 0.08);
    border: 1px solid rgba(0, 230, 118, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--green-accent);
    margin-bottom: 20px;
}

.sd-system-card-title {
    font-size: 18px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.sd-system-card-desc {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 20px;
}

.sd-system-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* ── 06. BATTERY TYPE CARDS (STEP 05) ────────────────────────────────────── */
.sd-battery-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.sd-battery-card {
    background: var(--bg-dark-card);
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.sd-battery-card:hover {
    border-color: var(--border-dark-hover);
    background: var(--bg-dark-elevated);
}

.sd-battery-card.sd-selected {
    border-color: var(--green-accent);
    background: var(--bg-dark-elevated);
    box-shadow: 0 0 16px rgba(0, 230, 118, 0.15);
}

.sd-battery-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}

.sd-battery-specs {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--green-accent);
    margin-bottom: 8px;
}

.sd-battery-desc {
    font-size: 12.5px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ── 07. RESULTS DASHBOARD (STEP 07) ─────────────────────────────────────── */
.sd-results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 28px 0;
}

.sd-result-card {
    background: var(--bg-dark-card);
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.sd-result-card:hover {
    border-color: var(--border-dark-hover);
    transform: translateY(-2px);
}

.sd-result-card.sd-highlight {
    background: #0b1e15;
    border-color: var(--green-accent);
    box-shadow: 0 10px 30px rgba(0, 230, 118, 0.12);
}

.sd-result-card-label {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.sd-result-card-value {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.1;
    margin-bottom: 8px;
}

.sd-result-card.sd-highlight .sd-result-card-value {
    color: var(--green-accent);
}

.sd-result-card-note {
    font-size: 12px;
    color: var(--text-subtle);
    line-height: 1.5;
}

.sd-design-id-badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(0, 230, 118, 0.1);
    border: 1.5px solid var(--green-accent);
    color: var(--green-accent);
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.2em;
    border-radius: 999px;
    box-shadow: 0 0 25px rgba(0, 230, 118, 0.25);
}

/* ── 08. SCHEMATIC SVG DIAGRAM ───────────────────────────────────────────── */
.sd-diagram-section {
    background: #05080a;
    border-top: 1px solid var(--border-dark);
    border-bottom: 1px solid var(--border-dark);
    margin: 40px 0;
    padding: 32px;
    border-radius: 8px;
}

.sd-diagram-wrapper {
    overflow-x: auto;
    padding: 16px 0;
}

@keyframes sd-flow-anim {
    to { stroke-dashoffset: -20; }
}

.sd-flow-line {
    stroke-dasharray: 6, 4;
    animation: sd-flow-anim 1.5s linear infinite;
}

/* ── 09. DISCLAIMER & PRELIMINARY NOTICE BOX ─────────────────────────────── */
.sd-disclaimer-box {
    background: rgba(251, 191, 36, 0.05);
    border: 1px solid rgba(251, 191, 36, 0.25);
    border-left: 4px solid var(--amber, #f59e0b);
    border-radius: 6px;
    padding: 18px 22px;
    margin: 20px 0;
}

.sd-disclaimer-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #f59e0b;
    margin-bottom: 6px;
}

.sd-disclaimer-text {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.6;
}

.sd-preliminary-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    background: rgba(251, 191, 36, 0.12);
    border: 1px solid rgba(251, 191, 36, 0.4);
    color: #fbbf24;
}

/* ── 10. STICKY SUMMARY BOTTOM BAR ───────────────────────────────────────── */
.sd-energy-summary-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 850;
    background: rgba(8, 11, 14, 0.94);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-dark);
    padding: 12px 32px;
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: 16px;
    transition: transform 0.3s ease;
}

.sd-summary-metric {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.sd-summary-value {
    color: var(--green-accent);
    font-weight: 700;
    font-size: 14px;
}

/* ── 11. MAP CONTAINER ───────────────────────────────────────────────────── */
.sd-map-container {
    width: 100%;
    height: 320px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-dark);
    margin-bottom: 12px;
    background: #0a0e13;
}

.sd-map-coords-display {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--green-accent);
    background: rgba(0, 0, 0, 0.4);
    padding: 8px 14px;
    border-radius: 4px;
    display: inline-block;
}

/* ── 12. NAVIGATION CONTROLS ─────────────────────────────────────────────── */
.sd-nav-buttons {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-dark);
}

.sd-results-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ── 13. MODALS & STATUS INDICATORS ──────────────────────────────────────── */
.sd-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.sd-modal-overlay.sd-open {
    display: flex;
}

.sd-modal-card {
    background: var(--bg-dark-card);
    border: 1px solid var(--border-dark);
    border-radius: 8px;
    padding: 40px;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.8);
    position: relative;
}

.sd-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
}

.sd-modal-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.sd-validation-summary {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.35);
    border-radius: 6px;
    padding: 14px 18px;
    color: #ef4444;
    font-size: 13.5px;
    margin-top: 20px;
}

.sd-cta-banner {
    background: #092116;
    border-bottom: 1px solid rgba(0, 230, 118, 0.25);
    padding: 10px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--green-accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.sd-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: sd-spin 0.8s linear infinite;
    display: inline-block;
}

@keyframes sd-spin {
    to { transform: rotate(360deg); }
}

/* ── 14. RESPONSIVE BREAKPOINTS ─────────────────────────────────────────── */
@media (max-width: 1100px) {
    .sd-results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .sd-system-selector-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .sd-step-label {
        display: none;
    }
    .sd-calculator-card {
        padding: 28px 20px;
    }
    .sd-results-grid {
        grid-template-columns: 1fr;
    }
    .sd-energy-summary-bar {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 16px;
    }
}