:root {
    --header-text-color: #485C6E;
    --color-grey-50: #F1F1F1;
    --color-grey-300: #A0A0A0;
    --color-grey-700: #505050;
}

body {
    font-family: 'Satoshi', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.main-content-wrapper {
    padding: 1.5rem;
}

.content-container {
    background-color: white;
    border: 1px solid var(--color-grey-50);
    box-shadow: 0px 1px 6px 0px rgba(0, 0, 0, 0.12);
    overflow: visible;
}

.header-title {
    font-size: clamp(1.5rem, 2vw + 1rem, 2rem);
    font-weight: 700;
    color: var(--header-text-color);
}

.header-desc {
    font-size: clamp(0.875rem, 1vw + 0.25rem, 1rem);
    font-weight: 400;
    color: var(--header-text-color);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 500px;
}

.separator {
    background-color: var(--color-grey-50);
    margin: auto;
    height: 95%;
    display: none;
    width: 0.15rem;
    margin: 0.5;
}

.input-section,
.output-section {
    padding: 0.5rem;
    border: none;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-grey-700);
    margin-bottom: 1rem;
}

/* ==========================================================================
   EMPTY STATE
   ========================================================================== */

.empty-state {
    min-height: 250px;
    background: #f8fafc;
    border: 2px dashed #cbd5e1;
    border-radius: 8px;
    padding: 2rem 1rem;
    text-align: center;
    color: #BEBEBE;
}

.empty-state h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #757682;
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 0.856rem;
    color: #757682;
    margin: 0;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.action-btns {
    height: 2.3125rem;
    position: relative;
    z-index: 1;
}

.header-action-btns {
    display: flex;
    gap: 0.5rem;
    height: 2.25rem;
}

.btn-primary {
    background: var(--color-primary-light);
    border: none;
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    flex: 1;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    background: var(--color-primary-dark);
}

.btn-primary:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}

.btn-loading-spinner {
    border: 1px solid #f3f4f6;
    border-top: 1px solid var(--color-primary-light);
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 1s linear infinite;
}

.btn-secondary {
    border: 1px solid var(--color-grey-50);
    box-shadow: 0px 1px 6px rgba(0, 0, 0, 0.12);
    width: 2.25rem;
    height: auto;
    background-color: white;
    color: #485C6E;
    transition: all 0.2s ease;
    cursor: pointer;
    border-radius: 0.375rem;
}

.btn-secondary:hover:not(:disabled) {
    background-color: #F9FAFB;
    box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.15);
    border-color: #E5E7EB;
}

.btn-secondary:disabled {
    background-color: #F5F5F5;
    color: #A1A1AA;
    border-color: #E5E5E5;
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.6;
}

/* ==========================================================================
   KEYFRAME ANIMATIONS
   ========================================================================== */

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   INPUT TEXTAREA & CHARACTER LIMIT
   ========================================================================== */

.input-group-custom {
    position: relative;
}

#essay-topic-textarea {
    min-height: 160px;
    resize: vertical;
    font-family: inherit;
    line-height: 1.5;
}

.char-counter {
    position: absolute;
    bottom: 8px;
    right: 12px;
    font-size: 12px;
    color: #6b7280;
    background: #fff;
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.char-limit-warning {
    color: #f59e0b;
    border-color: #f59e0b;
}

.char-limit-error {
    color: #ef4444;
    border-color: #ef4444;
}

.form-label {
    font-size: 14px;
    font-weight: 700;
    color: #757682;
    margin-bottom: 0.4rem;
}

/* Show '*' mark in red for required labels */
.form-label.required::after {
    content: " *";
    color: red;
    font-weight: 700;
}

/* Show (Optional) in gray for optional labels */
.form-label.optional::after {
    content: " (Optional)";
    font-weight: 400;
    color: #A0A0A0;
}

/* ==========================================================================
   ESSAY CONFIGURATION DROPDOWNS
   ========================================================================== */

.essay-configuration-dropdowns-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.8rem;
    width: 100%;
}

/* ==========================================================================
   RESULT SECTIONS
   ========================================================================== */

.converted-output {
    height: 100%;
    background-color: #f9f9f9;
    padding: 1rem;
    transition: all 0.2s ease;
}

#result-essay-text {
    background-color: white;
    border-radius: 0.75rem;
    border: 1px solid #e0e0e0;
    padding: 1rem;
    color: #374151;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
    word-break: break-word;
    overflow-y: auto;
}

/* Custom scrollbar for essay result */
#result-essay-text::-webkit-scrollbar {
    width: 6px;
}

#result-essay-text::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

#result-essay-text::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

#result-essay-text::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* For Firefox */
#result-essay-text {
    scrollbar-width: thin;
    scrollbar-color: #c1c1c1 #f1f1f1;
}

/* ==========================================================================
   RESPONSIVE DESIGN - BREAKPOINTS
   ========================================================================== */

/* Mobile Only */
@media (max-width: 767px) {
    .main-content-wrapper {
        padding: 1rem;
    }
    
    .essay-configuration-dropdowns-container {
        grid-template-columns: 1fr;
    }
    
    #result-essay-text {
        -ms-overflow-style: none !important;
        scrollbar-width: none !important;
    }

    #result-essay-text::-webkit-scrollbar {
        display: none !important;
    }
    
    .header-action-btns {
        gap: 0.25rem;
    }
    
    .btn-secondary {
        width: 2rem;
    }
}

/* Tablet and Up */
@media (min-width: 768px) {
    .essay-configuration-dropdowns-container {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
}

/* Desktop and Up */
@media (min-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr 1rem 1fr;
    }

    .separator {
        display: block;
    }

    .essay-configuration-dropdowns-container {
        grid-template-columns: 1fr 1fr;
    }
}

/* Large Desktop and Up */
@media (min-width: 1280px) {
    .essay-configuration-dropdowns-container {
        grid-template-columns: 1fr 1fr;
    }
}

/* ==========================================================================
   COLLAPSE TRANSITION (Legacy - can be removed if not used)
   ========================================================================== */

/* ==========================================================================
   TOAST & MODAL STYLES
   ========================================================================== */

#messageBox {
    position: absolute;
    top: 10%;
    right: 1%;
    z-index: 9999;
    max-width: 40%;
    width: auto;
}

.custom-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1050;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.custom-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.custom-modal.closing {
    opacity: 0;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 450px;
    padding: 0;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    transform: translateY(-20px) scale(0.95);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.custom-modal.show .modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.custom-modal.closing .modal-content {
    transform: translateY(-20px) scale(0.95);
    opacity: 0;
}

.modal-header {
    padding: 24px 24px 0;
    position: relative;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #64748b;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: #f1f5f9;
    color: #334155;
}

.modal-body {
    padding: 20px 24px;
}

.modal-description {
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

.modal-footer {
    padding: 0 24px 24px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.modal-btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.modal-btn-secondary {
    background: white;
    color: #64748b;
    border: 2px solid #e2e8f0;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-btn-secondary:hover {
    border-color: #cbd5e1;
    color: #475569;
}