:root {
    --bg-dark: #192331;
    --bg-sidebar: #0f172a;
    --bg-panel: #0f172a;
    --bg-input: #0f172a;
    --border: #334155;
    --primary: #4A6382;
    --accent: #22d3ee;
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --text-main: #FFFFFF;
    --text-muted: #94A3B8;
    --bg-hover: rgba(255, 255, 255, 0.08);
    --bg-alpha: rgba(0, 0, 0, 0.2);
}

body.light-theme {
    --bg-dark: #f3f4f6;
    --bg-sidebar: #ffffff;
    --bg-panel: #ffffff;
    --bg-input: #ffffff;
    --border: #e5e7eb;
    --primary: #8b92a9;
    --accent: #0284C7;
    --success: #059669;
    --danger: #DC2626;
    --warning: #D97706;
    --text-main: #000000;
    --text-muted: #4b5563;
    --bg-hover: rgba(0, 0, 0, 0.05);
    --bg-alpha: rgba(0, 0, 0, 0.08);
}

::selection {
    background-color: var(--accent) !important;
    color: #000000 !important;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: background-color 0.4s ease, color 0.4s ease;
}

#login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #111;
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.6)), url('fundo-studio.jpg');
    background-size: cover;
    background-position: center;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.logo-container {
    margin-bottom: 20px;
    z-index: 2;
    animation: float 3s infinite ease-in-out;
}

.tech-c-logo-svg {
    width: 130px;
    height: 130px;
    animation: pulseGlow 3s infinite ease-in-out;
    overflow: visible;
}

@keyframes pulseGlow {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
        filter: drop-shadow(0 0 25px #22d3ee);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.95);
        filter: drop-shadow(0 0 10px #22d3ee);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.login-box {
    width: 405px;
    padding: 50px 40px;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    text-align: center;
    z-index: 2;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-title {
    margin-bottom: 30px;
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-main);
    text-transform: uppercase;
    font-size: 1.8rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
    padding-bottom: 5px;
}

.login-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 12px;
    color: var(--text-main);
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    margin-bottom: 20px;
    transition: 0.3s;
}

.login-input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-panel);
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 800;
    letter-spacing: 1px;
    transition: 0.3s;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(34, 211, 238, 0.3);
}

.btn-login:hover {
    transform: translateY(-2px);
    background: #06b6d4;
}

#login-error {
    margin-top: 15px;
    color: var(--danger);
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(248, 113, 113, 0.1);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid rgba(248, 113, 113, 0.2);
}

#app-container {
    display: none;
    flex: 1;
    height: 100%;
}

.sidebar {
    width: 320px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-shadow: 5px 0 20px rgba(0, 0, 0, 0.2);
    overflow-y: auto;
}

.btn-new-materia {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    font-family: 'Inter', sans-serif;
}

.btn-new-materia:hover {
    background: var(--bg-hover);
    transform: translateX(5px);
}

.btn-ghost {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 10px;
    transition: 0.2s;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-ghost:hover {
    color: var(--text-main);
    background: var(--bg-hover);
}

.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    background-color: var(--bg-dark);
}

.search-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 15px;
    transition: 0.3s;
}

.search-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 8px rgba(34, 211, 238, 0.2);
}

.search-wrapper input {
    background: transparent;
    border: none;
    color: var(--text-main);
    margin-left: 10px;
    width: 100%;
    outline: none;
    font-family: 'Inter';
}

.link-card {
    background: var(--bg-panel);
    border-left: 4px solid var(--accent);
    padding: 20px;
    border-radius: 10px;
    border-top: 1px solid var(--border);
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.link-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    border-right-color: var(--accent);
}

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.95rem;
    transition: 0.2s;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background: #06b6d4;
    transform: scale(1.02);
}

.btn-danger {
    background: rgba(248, 113, 113, 0.1);
    color: var(--danger);
    border: 1px solid rgba(248, 113, 113, 0.2);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    z-index: 10000;
    display: none;
    justify-content: center;
    align-items: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-window {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    max-height: 90vh;
    padding: 25px;
    overflow-y: auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.modal-input,
select,
textarea {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 12px;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: 0.2s;
}

.modal-input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.1);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}