/* ============================================
   FORMULA BUILDER - CALCULATOR STYLE CSS
   ============================================ */

/* === GENEL LAYOUT === */
.formula-builder-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 24px;
    min-height: 75vh;
}

@media (max-width: 960px) {
    .formula-builder-container {
        grid-template-columns: 1fr;
    }
}

/* === SOL PANEL - HESAP MAKİNESİ === */
.calculator-panel {
    background: linear-gradient(145deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.calculator-panel::-webkit-scrollbar {
    width: 4px;
}

.calculator-panel::-webkit-scrollbar-track {
    background: transparent;
}

.calculator-panel::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.calc-section-title {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
    margin-top: 16px;
    padding-left: 4px;
}

.calc-section-title:first-child {
    margin-top: 0;
}

/* Sayı Grid */
.calc-number-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

/* Operatör Grid */
.calc-operator-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

/* Parantez Grid */
.calc-paren-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

/* Label Grid */
.calc-label-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* === HESAP MAKİNESİ BUTONLARI === */
.calc-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 8px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: grab;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    border: 1px solid transparent;
    min-height: 44px;
    position: relative;
    overflow: hidden;
}

.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.calc-btn:active {
    transform: translateY(0);
    cursor: grabbing;
}

/* Sayı butonları */
.calc-btn-number {
    background: linear-gradient(145deg, #2d2d44, #25253a);
    color: #e0e0e0;
    border-color: rgba(255, 255, 255, 0.08);
}

.calc-btn-number:hover {
    background: linear-gradient(145deg, #3a3a52, #2d2d44);
    border-color: rgba(255, 255, 255, 0.15);
    color: white;
}

/* Operatör butonları */
.calc-btn-operator {
    background: linear-gradient(145deg, #ff9800, #f57c00);
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
}

.calc-btn-operator:hover {
    background: linear-gradient(145deg, #ffa726, #ff9800);
    box-shadow: 0 8px 24px rgba(255, 152, 0, 0.4);
}

/* Parantez butonları */
.calc-btn-paren {
    background: linear-gradient(145deg, #7c4dff, #651fff);
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
}

.calc-btn-paren:hover {
    background: linear-gradient(145deg, #9c7cff, #7c4dff);
    box-shadow: 0 8px 24px rgba(124, 77, 255, 0.4);
}

/* Label butonları */
.calc-btn-label {
    background: linear-gradient(145deg, #00bcd4, #0097a7);
    color: white;
    font-size: 0.85rem;
    padding: 10px 16px;
    border-radius: 20px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.calc-btn-label:hover {
    background: linear-gradient(145deg, #26c6da, #00bcd4);
    box-shadow: 0 8px 24px rgba(0, 188, 212, 0.4);
}

/* Nokta butonu */
.calc-btn-dot {
    background: linear-gradient(145deg, #455a64, #37474f);
    color: #e0e0e0;
    font-size: 1.2rem;
    font-weight: 700;
}

.calc-btn-dot:hover {
    background: linear-gradient(145deg, #546e7a, #455a64);
}

/* Kayıtlı formül butonları */
.calc-btn-saved {
    background: linear-gradient(145deg, #2e7d32, #1b5e20);
    color: white;
    font-size: 0.8rem;
    padding: 8px 14px;
    border-radius: 16px;
    font-weight: 500;
}

.calc-btn-saved:hover {
    background: linear-gradient(145deg, #43a047, #2e7d32);
    box-shadow: 0 8px 24px rgba(46, 125, 50, 0.4);
}

/* DRAG göstergesi */
.calc-btn::after {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s;
}

.calc-btn:hover::after {
    opacity: 1;
}

/* === SAĞ PANEL - FORMÜL EDİTÖRÜ === */
.formula-editor-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Drop Zone */
.formula-drop-zone {
    min-height: 180px;
    background: linear-gradient(135deg, #f8f9ff, #eef1ff);
    border: 3px dashed #c5cae9;
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    align-content: flex-start;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.formula-drop-zone.drop-zone-active {
    border-color: #667eea;
    background: linear-gradient(135deg, #eef0ff, #e3e7ff);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15), 0 12px 40px rgba(102, 126, 234, 0.15);
    transform: scale(1.005);
}

.formula-drop-zone-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 140px;
    color: #9e9e9e;
    gap: 12px;
}

.formula-drop-zone-empty .drop-icon {
    font-size: 3rem;
    opacity: 0.4;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Drop Ripple */
.drop-ripple {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.3);
    transform: translate(-50%, -50%) scale(0);
    animation: ripple-expand 0.6s ease-out forwards;
    pointer-events: none;
}

@keyframes ripple-expand {
    to {
        transform: translate(-50%, -50%) scale(15);
        opacity: 0;
    }
}

/* === TOKEN CHİP'LERİ === */
.formula-token {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: default;
    transition: all 0.2s ease;
    position: relative;
    animation: token-pop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

@keyframes token-pop {
    0% {
        opacity: 0;
        transform: scale(0.5) translateY(10px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.formula-token:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Token tipleri */
.formula-token-label {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.formula-token-operator {
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    padding: 8px 12px;
    min-width: 36px;
    justify-content: center;
}

.formula-token-number {
    background: linear-gradient(135deg, #eceff1, #cfd8dc);
    color: #37474f;
}

.formula-token-paren {
    background: linear-gradient(135deg, #7c4dff, #651fff);
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    padding: 8px 12px;
    min-width: 36px;
    justify-content: center;
}

/* Token Sil butonu */
.token-delete-btn {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.2);
    border: none;
    color: white;
    font-size: 0.65rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    opacity: 0;
    margin-left: 2px;
}

.formula-token:hover .token-delete-btn {
    opacity: 1;
}

.token-delete-btn:hover {
    background: rgba(244, 67, 54, 0.8);
    transform: scale(1.2);
}

/* Token Insert Zone */
.token-insert-zone {
    width: 20px;
    margin: 0 -8px;
    min-height: 36px;
    border-radius: 4px;
    background: transparent;
    transition: all 0.2s ease;
    flex-shrink: 0;
    position: relative;
    z-index: 5;
}

.token-insert-zone.token-insert-highlight {
    width: 8px;
    background: linear-gradient(180deg, #667eea, #764ba2);
    box-shadow: 0 0 12px rgba(102, 126, 234, 0.5);
}

/* === PREVIEW ALANI === */
.formula-preview {
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    border-radius: 16px;
    padding: 20px 24px;
    color: #00e676;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
    word-break: break-all;
    min-height: 48px;
    display: flex;
    align-items: center;
}

.formula-preview-empty {
    color: rgba(255, 255, 255, 0.3);
    font-style: italic;
}

/* === DOĞRULAMA MESAJLARI === */
.validation-banner {
    border-radius: 12px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    animation: slide-in 0.3s ease;
}

@keyframes slide-in {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.validation-success {
    background: rgba(76, 175, 80, 0.1);
    color: #4caf50;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.validation-error {
    background: rgba(244, 67, 54, 0.1);
    color: #f44336;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

.validation-warning {
    background: rgba(255, 152, 0, 0.1);
    color: #ff9800;
    border: 1px solid rgba(255, 152, 0, 0.3);
}

/* === KAYITLI FORMÜLLER LİSTESİ === */
.saved-formulas-section {
    margin-top: 8px;
}

.saved-formula-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.saved-formula-chip:hover {
    background: rgba(255, 255, 255, 0.12);
    color: white;
    border-color: rgba(255, 255, 255, 0.2);
}