:root {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --card-border: rgba(255, 255, 255, 0.1);
    
    --primary-color: #3b82f6;
    --accent-color: #3b82f6;
    --primary-hover: #2563eb;
    --accent-hover: #2563eb;
    
    --col-bg: rgba(15, 23, 42, 0.5);
    
    --status-aguardando: #64748b;
    --status-digitacao: #eab308;
    --status-registrado: #22c55e;
    
    --font-family: 'Inter', sans-serif;
    --input-bg: rgba(15, 23, 42, 0.6);
}

.light-theme {
    --bg-color: #f1f5f9;
    --text-color: #0f172a;
    --text-primary: #0f172a;
    --card-bg: rgba(255, 255, 255, 0.9);
    --border-color: rgba(0, 0, 0, 0.1);
    --card-border: rgba(0, 0, 0, 0.1);
    --primary-color: #2563eb;
    --accent-color: #2563eb;
    --primary-hover: #1d4ed8;
    --accent-hover: #1d4ed8;
    --col-bg: rgba(226, 232, 240, 0.7);
    --input-bg: #ffffff;
}

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

body {
    font-family: var(--font-family);
    background: var(--bg-color);
    background-image: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 25%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.1);
}
::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 4px;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--accent-color);
}
.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.logo i {
    font-size: 1.5rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}
.btn-secondary {
    background: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
}

/* KANBAN */
.kanban-board {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    flex: 1;
    overflow-x: auto;
    align-items: flex-start;
}

.kanban-column {
    flex: 1;
    min-width: 320px;
    background: var(--col-bg);
    border-radius: 16px;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 120px);
}

.column-header {
    padding: 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
}

.column-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#col-aguardando .column-header h2 { color: var(--status-aguardando); }
#col-em-digitacao .column-header h2 { color: var(--status-digitacao); }
#col-registrado .column-header h2 { color: var(--status-registrado); }

.badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.kanban-cards {
    padding: 1rem;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 150px;
}

/* CARDS */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.2rem;
    cursor: grab;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.card:active {
    cursor: grabbing;
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
}
.card.dragging {
    opacity: 0.5;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}
.card-title {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}
.card-ref {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(0,0,0,0.2);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.card-body {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}
.card-body p {
    margin-bottom: 0.25rem;
}
.card-body strong {
    color: var(--text-primary);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 0.75rem;
    font-size: 0.8rem;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}
.card-actions button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
    padding: 0.2rem;
}
.card-actions button:hover {
    color: var(--text-primary);
}

/* MODAL */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: #1e293b;
    width: 90%;
    max-width: 600px;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    transition: transform 0.3s;
}
.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}
.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
}
.close-btn:hover { color: var(--text-primary); }

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
    flex: 1;
}
.form-row {
    display: flex;
    gap: 1rem;
}
@media (max-width: 600px) {
    .form-row { flex-direction: column; gap: 0; }
}

label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}
input, textarea, select {
    width: 100%;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 8px;
    font-family: var(--font-family);
    transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--card-border);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--card-bg);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1100;
}
.toast.show {
    transform: translateY(0);
    opacity: 1;
}
.toast.success { border-left-color: var(--status-registrado); }
.toast.error { border-left-color: #ef4444; }

/* ========================================================= */
/*                   TELA DE LOGIN                           */
/* ========================================================= */
#login-screen {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s;
}

#login-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.login-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    width: 350px;
    max-width: 90%;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    text-align: center;
}

.login-box h1 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.login-box p {
    color: #94a3b8;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.login-box input {
    background: var(--input-bg);
}

.login-box button {
    width: 100%;
    margin-top: 1rem;
    padding: 0.75rem;
    font-size: 1rem;
}

/* ========================================================= */
/*                   RESPONSIVIDADE (MOBILE)                 */
/* ========================================================= */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1rem;
    }
    
    .header-actions {
        width: 100%;
        display: flex;
        justify-content: space-between;
        gap: 0.5rem;
    }
    
    .header-actions button {
        flex: 1;
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .kanban-board {
        flex-direction: row;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding: 1rem;
        -webkit-overflow-scrolling: touch;
    }
    
    .kanban-column {
        min-width: 85vw;
        scroll-snap-align: center;
        margin-right: 1rem;
    }
    
    .modal-content {
        width: 95%;
        padding: 1.5rem;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
}