html {
    font-size: 14px;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem #00ff41, 0 0 0 0.25rem #1a1a1a;
}

html {
    position: relative;
    min-height: 100%;
}

body {
    margin-bottom: 60px;
    background: linear-gradient(135deg, #0a0a0a, #1a1a1a, #0d1b0d);
    min-height: 100vh;
    font-family: "Segoe UI", sans-serif;
    color: #ffffff;
    overflow-x: hidden;
}

/* Matrix rain effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, transparent 98%, rgba(0, 255, 65, 0.1) 100%),
        linear-gradient(180deg, transparent 98%, rgba(0, 255, 65, 0.1) 100%);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
    animation: matrix 20s linear infinite;
}

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

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: #888888;
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

.mt-5 {
    margin-top: 1rem !important;
}

.mb-4 {
    margin-bottom: 0.5rem !important;
}

.card-custom {
    border: 2px solid #00ff41;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 255, 65, 0.2);
    background: linear-gradient(145deg, #1a1a1a, #0d1b0d);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.card-custom::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 65, 0.1), transparent);
    transition: left 0.5s;
}

.card-custom:hover::before {
    left: 100%;
}

.card-header {
    background: linear-gradient(90deg, #00ff41, #00cc33);
    padding: 15px 20px;
    border-radius: 14px 14px 0 0;
    cursor: pointer;
    color: #000000;
    font-weight: bold;
    position: relative;
}

.card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #000000, transparent);
}

.card-header h5 {
    margin: 0;
    color: #000000;
}

.card-body {
    padding: 20px;
    background: transparent;
}

textarea[readonly],
input[readonly] {
    background-color: #2a2a2a;
    color: #00ff41;
    border: 1px solid #00ff41;
    resize: none;
}

textarea,
input[type="text"],
input[type="password"] {
    background-color: #2a2a2a;
    color: #ffffff;
    border: 1px solid #00ff41;
}

textarea:focus,
input[type="text"]:focus,
input[type="password"]:focus {
    background-color: #1a1a1a;
    color: #ffffff;
    border: 2px solid #00ff41;
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

.collapse-content {
    display: none;
}

.collapse-content.show {
    display: block;
}

.btn-custom-gray {
    background: linear-gradient(45deg, #333333, #555555) !important;
    color: #00ff41 !important;
    border: 1px solid #00ff41 !important;
    transition: all 0.3s ease;
}

.btn-custom-gray:hover {
    background: linear-gradient(45deg, #555555, #777777) !important;
    color: #ffffff !important;
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.5);
    transform: translateY(-2px);
}

.btn-custom-generate {
    background: linear-gradient(45deg, #00ff41, #00cc33) !important;
    color: #000000 !important;
    border: none !important;
    font-weight: bold;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-custom-generate::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-custom-generate:hover::before {
    left: 100%;
}

.btn-custom-generate:hover {
    background: linear-gradient(45deg, #00cc33, #009926) !important;
    color: #ffffff !important;
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.6);
    transform: translateY(-2px);
}

.btn-ecc-encrypt {
    background: linear-gradient(45deg, #00ff41, #00cc33) !important;
    border: 2px solid #00ff41 !important;
    color: #000000 !important;
    font-weight: 700 !important;
    box-shadow: 0 0 20px rgba(0,255,65,0.4) !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
}

.btn-ecc-encrypt:hover {
    background: linear-gradient(45deg, #00cc33, #00ff41) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 30px rgba(0,255,65,0.5) !important;
    color: #000000 !important;
}

.btn-ecc-decrypt {
    background: linear-gradient(45deg, #ff6b35, #cc5500) !important;
    border: 2px solid #ff6b35 !important;
    color: #ffffff !important;
    font-weight: 700 !important;
    box-shadow: 0 0 20px rgba(255,107,53,0.4) !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
}

.btn-ecc-decrypt:hover {
    background: linear-gradient(45deg, #cc5500, #ff6b35) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 30px rgba(255,107,53,0.5) !important;
    color: #ffffff !important;
}

.btn-sha256-hash {
    background: linear-gradient(45deg, #0d1b0d, #1a331a);
    color: #00ff41;
    border: 1px solid #00ff41;
    transition: all 0.3s ease;
    font-weight: bold;
    position: relative;
    overflow: hidden;
}

.btn-sha256-hash::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 65, 0.2), transparent);
    transition: left 0.5s;
}

.btn-sha256-hash:hover::before {
    left: 100%;
}

.btn-sha256-hash:hover {
    background: linear-gradient(45deg, #1a331a, #2a4d2a);
    color: #ffffff;
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.5);
    transform: translateY(-2px);
}

.btn-green {
    background: linear-gradient(45deg, #00ff41, #00cc33);
    color: #000000;
    border: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-green:hover {
    background: linear-gradient(45deg, #00cc33, #009926);
    color: #ffffff;
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.5);
    transform: translateY(-2px);
}

.btn-orange {
    background: linear-gradient(45deg, #1a1a1a, #333333);
    color: #00ff41;
    border: 1px solid #00ff41;
    transition: all 0.3s ease;
    font-weight: bold;
}

.btn-orange:hover {
    background: linear-gradient(45deg, #333333, #555555);
    color: #ffffff;
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.5);
    transform: translateY(-2px);
}

.btn-orange-outline {
    background-color: transparent;
    border: 2px solid #00ff41;
    color: #00ff41;
    transition: all 0.3s ease;
}

.btn-orange-outline:hover {
    background: linear-gradient(45deg, #00ff41, #00cc33);
    color: #000000;
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.5);
    transform: translateY(-2px);
}

/* Navbar styling */
.navbar-dark {
    background: linear-gradient(90deg, #0a0a0a, #1a1a1a) !important;
    border-bottom: 2px solid #00ff41;
    box-shadow: 0 2px 15px rgba(0, 255, 65, 0.3);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    color: #00ff41 !important;
    font-weight: bold;
    font-size: 1.5rem;
    text-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    text-shadow: 0 0 20px rgba(0, 255, 65, 0.8);
    transform: scale(1.05);
}

/* Footer styling */
.footer {
    background: linear-gradient(90deg, #0a0a0a, #1a1a1a);
    border-top: 2px solid #00ff41;
    color: #00ff41 !important;
    padding: 20px 0;
    text-align: center;
    backdrop-filter: blur(10px);
}

/* Form styling */
.form-control {
    background-color: #2a2a2a;
    border: 1px solid #00ff41;
    color: #ffffff;
    transition: all 0.3s ease;
}

.form-control:focus {
    background-color: #1a1a1a;
    border: 2px solid #00ff41;
    color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

.form-label {
    color: #00ff41;
    font-weight: bold;
    text-shadow: 0 0 5px rgba(0, 255, 65, 0.3);
}

/* Alert styling */
.alert {
    background: linear-gradient(45deg, #1a1a1a, #0d1b0d);
    border: 1px solid #00ff41;
    color: #00ff41;
}

.alert-success {
    background: linear-gradient(45deg, #0d1b0d, #1a331a);
    border: 1px solid #00ff41;
    color: #00ff41;
}

.alert-danger {
    background: linear-gradient(45deg, #1a0d0d, #331a1a);
    border: 1px solid #ff0040;
    color: #ff0040;
}

/* Table styling */
.table {
    background: transparent;
    color: #ffffff;
}

.table th {
    background: linear-gradient(45deg, #00ff41, #00cc33);
    color: #000000;
    border: 1px solid #00ff41;
}

.table td {
    background: transparent;
    color: #ffffff;
    border: 1px solid #333333;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #1a1a1a;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #00ff41, #00cc33);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #00cc33, #009926);
}

/* Animation for cards */
.card-custom {
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        box-shadow: 0 8px 25px rgba(0, 255, 65, 0.2);
    }
    to {
        box-shadow: 0 8px 35px rgba(0, 255, 65, 0.4);
    }
}

/* File input styling */
input[type="file"] {
    background-color: #2a2a2a;
    border: 1px solid #00ff41;
    color: #ffffff;
}

input[type="file"]:focus {
    background-color: #1a1a1a;
    border: 2px solid #00ff41;
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

/* Button group styling */
.btn-group .btn {
    border-radius: 8px;
    margin: 0 2px;
}

.btn-group .btn:first-child {
    border-top-left-radius: 8px;
    border-bottom-left-radius: 8px;
}

.btn-group .btn:last-child {
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
}

/* Responsive design improvements */
@media (max-width: 768px) {
    .card-custom {
        margin: 10px;
        border-radius: 12px;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .btn-lg {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
    }
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 255, 65, 0.3);
    border-radius: 50%;
    border-top-color: #00ff41;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- Enhanced Navbar & Navigation Buttons --- */
.nav-glow {
    background: rgba(10, 10, 10, 0.92) !important;
    border-bottom: 2.5px solid #00ff41;
    box-shadow: 0 4px 32px 0 rgba(0,255,65,0.18), 0 1.5px 0 #00ff41;
    backdrop-filter: blur(8px);
    position: relative;
    z-index: 10;
    animation: navFadeIn 1.2s cubic-bezier(.77,0,.18,1) 0.1s both;
}
@keyframes navFadeIn {
    0% { opacity: 0; transform: translateY(-30px) scale(0.98); }
    100% { opacity: 1; transform: none; }
}

.nav-logo-icon {
    filter: drop-shadow(0 0 8px #00ff41cc);
    animation: navIconGlow 2.5s infinite alternate;
}
@keyframes navIconGlow {
    0% { filter: drop-shadow(0 0 8px #00ff41cc); }
    100% { filter: drop-shadow(0 0 18px #00ff41); }
}

.nav-logo-text {
    color: #00ff41;
    text-shadow: 0 0 12px #00ff41cc, 0 0 2px #000;
    letter-spacing: 1.5px;
    font-size: 1.7rem;
    font-family: 'Orbitron', monospace;
    font-weight: 900;
}

.nav-btn-group {
    gap: 0.7rem;
    display: flex;
    align-items: center;
}

.nav-btn {
    font-size: 1.13rem;
    border-radius: 12px !important;
    padding: 0.7rem 1.3rem 0.7rem 1.1rem;
    box-shadow: 0 0 0 #00ff41;
    transition: box-shadow 0.25s, transform 0.18s, background 0.25s, color 0.18s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.nav-btn:hover, .nav-btn:focus {
    box-shadow: 0 0 16px 2px #00ff41cc, 0 0 2px #000;
    transform: translateY(-2px) scale(1.04);
    z-index: 2;
}

.nav-btn-icon {
    font-size: 1.3em;
    filter: drop-shadow(0 0 6px #00ff4199);
    transition: filter 0.3s;
}

.nav-btn:hover .nav-btn-icon, .nav-btn:focus .nav-btn-icon {
    filter: drop-shadow(0 0 16px #00ff41);
}

@media (max-width: 992px) {
    .nav-logo-text { font-size: 1.2rem; }
    .nav-btn { font-size: 1rem; padding: 0.6rem 1rem; }
    .nav-btn-icon { font-size: 1.1em; }
}
@media (max-width: 576px) {
    .nav-logo-text { font-size: 1rem; }
    .nav-btn { font-size: 0.95rem; padding: 0.5rem 0.7rem; }
    .nav-btn-icon { font-size: 1em; }
}
/* --- End Enhanced Navbar --- */

/* --- Animated Encryption Background --- */
.encryption-bg {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.encryption-symbol {
    position: absolute;
    font-size: 2.2rem;
    color: #00ff41cc;
    opacity: 0.18;
    animation: floatEncryption 12s linear infinite;
    filter: blur(0.5px) drop-shadow(0 0 8px #00ff41cc);
    user-select: none;
}

@keyframes floatEncryption {
    0% {
        transform: translateY(110vh) scale(0.7) rotate(-10deg);
        opacity: 0.18;
    }
    10% {
        opacity: 0.28;
    }
    80% {
        opacity: 0.28;
    }
    100% {
        transform: translateY(-15vh) scale(1.1) rotate(10deg);
        opacity: 0.18;
    }
}

/* Responsive: reduce symbol size on mobile */
@media (max-width: 600px) {
    .encryption-symbol { font-size: 1.2rem; }
}
/* --- End Animated Encryption Background --- */

/* --- Additional Styles for Redesigned Pages --- */
.custom-input {
    background: rgba(10, 10, 10, 0.8) !important;
    border: 2px solid #00ff41 !important;
    border-radius: 12px !important;
    color: #ffffff !important;
    font-family: 'Orbitron', monospace !important;
    font-size: 0.95rem !important;
    padding: 12px 16px !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
    box-shadow: 0 0 0 0 rgba(0,255,65,0.2) !important;
}

.custom-input:focus {
    background: rgba(15, 15, 15, 0.9) !important;
    border-color: #00ff41 !important;
    box-shadow: 0 0 0 4px rgba(0,255,65,0.15), 0 0 20px rgba(0,255,65,0.3) !important;
    outline: none !important;
    transform: translateY(-1px) !important;
}

.custom-input::placeholder {
    color: #666666 !important;
    font-style: italic !important;
}

.custom-textarea {
    background: rgba(10, 10, 10, 0.8) !important;
    border: 2px solid #00ff41 !important;
    border-radius: 12px !important;
    color: #ffffff !important;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace !important;
    font-size: 0.9rem !important;
    padding: 12px 16px !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
    box-shadow: 0 0 0 0 rgba(0,255,65,0.2) !important;
    resize: vertical !important;
    min-height: 120px !important;
}

.custom-textarea:focus {
    background: rgba(15, 15, 15, 0.9) !important;
    border-color: #00ff41 !important;
    box-shadow: 0 0 0 4px rgba(0,255,65,0.15), 0 0 20px rgba(0,255,65,0.3) !important;
    outline: none !important;
    transform: translateY(-1px) !important;
}

.custom-textarea::placeholder {
    color: #666666 !important;
    font-style: italic !important;
}

/* Enhanced Button Group Styling */
.btn-group .btn {
    border: 2px solid #00ff41 !important;
    background: rgba(10, 10, 10, 0.8) !important;
    color: #00ff41 !important;
    font-family: 'Orbitron', monospace !important;
    font-weight: 600 !important;
    font-size: 0.9rem !important;
    padding: 12px 20px !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
    position: relative !important;
    overflow: hidden !important;
}

.btn-group .btn:hover {
    background: rgba(0,255,65,0.1) !important;
    color: #ffffff !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 25px rgba(0,255,65,0.3) !important;
}

.btn-group .btn.active {
    background: linear-gradient(45deg, #00ff41, #00cc33) !important;
    color: #000000 !important;
    font-weight: 700 !important;
    box-shadow: 0 0 20px rgba(0,255,65,0.4) !important;
}

.btn-group .btn:first-child {
    border-top-left-radius: 12px !important;
    border-bottom-left-radius: 12px !important;
}

.btn-group .btn:last-child {
    border-top-right-radius: 12px !important;
    border-bottom-right-radius: 12px !important;
}

/* File Input Styling */
input[type="file"].custom-input {
    padding: 8px 12px !important;
    cursor: pointer !important;
}

input[type="file"].custom-input::-webkit-file-upload-button {
    background: linear-gradient(45deg, #00ff41, #00cc33) !important;
    color: #000000 !important;
    border: none !important;
    border-radius: 8px !important;
    padding: 8px 16px !important;
    font-family: 'Orbitron', monospace !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.3s ease !important;
}

input[type="file"].custom-input::-webkit-file-upload-button:hover {
    background: linear-gradient(45deg, #00cc33, #00ff41) !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 15px rgba(0,255,65,0.3) !important;
}

/* Enhanced Form Label Styling */
.form-label {
    margin-bottom: 8px !important;
    font-size: 0.95rem !important;
    letter-spacing: 0.5px !important;
    text-shadow: 0 0 10px rgba(0,255,65,0.3) !important;
}

/* Responsive adjustments for smaller screens */
@media (max-width: 768px) {
    .custom-input, .custom-textarea {
        font-size: 0.85rem !important;
        padding: 10px 14px !important;
    }
    
    .btn-group .btn {
        font-size: 0.8rem !important;
        padding: 10px 16px !important;
    }
    
    .form-label {
        font-size: 0.9rem !important;
    }
}

/* Keep RSA styles for backward compatibility but make them identical to ECC */
.btn-rsa-encrypt {
    background: linear-gradient(45deg, #00ff41, #00cc33) !important;
    border: 2px solid #00ff41 !important;
    color: #000000 !important;
    font-weight: 700 !important;
    box-shadow: 0 0 20px rgba(0,255,65,0.4) !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
}

.btn-rsa-encrypt:hover {
    background: linear-gradient(45deg, #00cc33, #00ff41) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 30px rgba(0,255,65,0.5) !important;
    color: #000000 !important;
}

.btn-rsa-decrypt {
    background: linear-gradient(45deg, #ff6b35, #cc5500) !important;
    border: 2px solid #ff6b35 !important;
    color: #ffffff !important;
    font-weight: 700 !important;
    box-shadow: 0 0 20px rgba(255,107,53,0.4) !important;
    transition: all 0.3s cubic-bezier(.77,0,.18,1) !important;
}

.btn-rsa-decrypt:hover {
    background: linear-gradient(45deg, #cc5500, #ff6b35) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 30px rgba(255,107,53,0.5) !important;
    color: #ffffff !important;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
@keyframes fadeInDown {
    0% { opacity: 0; transform: translateY(-40px); }
    100% { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(40px); }
    100% { opacity: 1; transform: translateY(0); }
}
@keyframes lock-glow {
    0% { filter: drop-shadow(0 0 6px #00ff41) drop-shadow(0 0 12px #00ff41); }
    100% { filter: drop-shadow(0 0 18px #00ff41) drop-shadow(0 0 32px #00ff41); }
}