:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --accent-color: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --card-bg: rgba(17, 24, 39, 0.6);
    --card-border: rgba(255, 255, 255, 0.05);
    --card-hover-border: rgba(59, 130, 246, 0.4);
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-light-muted: #6b7280;
    --gold-gradient: linear-gradient(135deg, #fbbf24 0%, #d97706 100%);
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
    --success-gradient: linear-gradient(135deg, #10b981 0%, #047857 100%);
}

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(30, 58, 138, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(17, 24, 39, 0.8) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(13, 148, 136, 0.08) 0px, transparent 50%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: #1f2937;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #374151;
}

/* Header design */
.app-header {
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-area .logo-icon {
    font-size: 1.8rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 8px rgba(59, 130, 246, 0.3));
}

.logo-area .main-title {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: #ffffff;
    line-height: 1.2;
}

.logo-area .sub-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 0.5px;
}

.btn-add-project {
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    border-radius: 30px;
    padding: 0.5rem 1.25rem;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-add-project:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    color: #ffffff;
}

/* Content Container */
.app-main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
}

/* Centralized Grid and Platform Styling */
.platform-container {
    max-width: 1200px;
    width: 90%;
    margin: 0 auto;
    text-align: center;
}

.platform-title-area {
    margin-bottom: 3rem;
}

.platform-title {
    font-weight: 800;
    font-size: 2.5rem;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.platform-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Project Cards Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
}

/* Project Card Button */
.project-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem 1.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--card-hover-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 20px var(--accent-glow);
}

.project-card:hover::before {
    opacity: 1;
}

.project-icon-wrapper {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    font-size: 2rem;
    color: var(--accent-color);
    transition: all 0.4s ease;
}

.project-card:hover .project-icon-wrapper {
    background: var(--accent-gradient);
    color: #ffffff;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.project-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #ffffff;
    transition: color 0.3s ease;
}

.project-card:hover .project-name {
    color: #60a5fa;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 1rem;
    flex-grow: 1;
}

/* Card Control Buttons (Edit/Delete Overlay) */
.card-actions-overlay {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
    z-index: 5;
}

.card-wrapper:hover .card-actions-overlay {
    opacity: 1;
    transform: translateY(0);
}

.action-btn-mini {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(17, 24, 39, 0.9);
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn-mini:hover {
    transform: scale(1.1);
}

.action-btn-mini.edit:hover {
    color: #fbbf24;
    border-color: #fbbf24;
}

.action-btn-mini.delete:hover {
    color: #ef4444;
    border-color: #ef4444;
}

/* Empty State */
.empty-state {
    padding: 4rem 2rem;
    background: var(--card-bg);
    border: 1px dashed var(--card-border);
    border-radius: 20px;
    max-width: 500px;
    margin: 0 auto;
}

.empty-state-icon {
    font-size: 3.5rem;
    color: var(--text-light-muted);
    margin-bottom: 1.5rem;
}

/* Modal Design (Glassmorphism & Sleek Dark) */
.modal-content-dark {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-hover-border);
    border-radius: 24px;
    color: var(--text-main);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-header-dark {
    border-bottom: 1px solid var(--card-border);
    padding: 1.5rem 1.5rem 1rem 1.5rem;
}

.modal-title-dark {
    font-weight: 700;
    font-size: 1.35rem;
}

.modal-body-dark {
    padding: 1.5rem;
}

.modal-footer-dark {
    border-top: 1px solid var(--card-border);
    padding: 1rem 1.5rem 1.5rem 1.5rem;
}

.btn-close-white {
    filter: invert(1) grayscale(100%) brightness(200%);
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.btn-close-white:hover {
    opacity: 1;
}

/* Form Styling */
.form-label-custom {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.form-control-dark {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: #ffffff;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-control-dark:focus {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-color);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.2);
    color: #ffffff;
}

.form-select-dark {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: #ffffff;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-select-dark:focus {
    background: rgba(17, 24, 39, 0.95);
    border-color: var(--accent-color);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.2);
    color: #ffffff;
}

.form-check-input-custom {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    cursor: pointer;
}

.form-check-input-custom:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Dropdown styling */
select.form-select-dark option {
    background-color: #111827;
    color: #ffffff;
}

/* Modal Actions Buttons */
.btn-dark-modal-cancel {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.6rem 1.25rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.btn-dark-modal-cancel:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
}

.btn-dark-modal-save {
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease;
}

.btn-dark-modal-save:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

/* App Footer */
.text-light-muted {
    color: #9ca3af;
    font-size: 0.95rem;
    font-weight: 500;
}

.text-light-muted-xs {
    color: #4b5563;
    font-size: 0.8rem;
}