diff --git a/README.md b/README.md index 79186a6..aa96536 100644 --- a/README.md +++ b/README.md @@ -13,8 +13,9 @@ Yes. Consider sharing it with your classmates ;) Here's a quick rundown of how to build from source: 1) download or clone the repository ```git clone https://git.sasserisop.com/Sasserisop/MATH201``` 2) make sure you have hugo installed -3) open a command prompt in the MATH201/ directory and run the command ```hugo server --disableFastRender``` -4) visit your site by opening http://localhost:1313 on your browser. +3) if you are using localhost, inside of themes/zettels/assets/js/search.js set 'const localhost' to true. +4) open a command prompt in the MATH201/ directory and run the command ```hugo server --disableFastRender``` +5) visit your site by opening http://localhost:1313 on your browser. Now if you want to host it on a live website, you can run: ```hugo``` diff --git a/content/_index.md b/content/_index.md index b38f35a..8a01ffd 100644 --- a/content/_index.md +++ b/content/_index.md @@ -1,32 +1,6 @@ # This is the main index These are notes for the [University of Alberta MATH 201 - Differential Equations](https://apps.ualberta.ca/catalogue/course/math/201) course. -I have written these notes for myself, I thought it would be cool to share them. These notes may be inaccurate, incomplete, or incoherent. No warranty is expressed or implied. Reader assumes all risk and liabilities. - -[Separable equations (lec 1)](separable-equations-lec-1.html) -[Homogenous equations (lec 2)](homogenous-equations-lec-2.html) -[Linear equations (lec 2-3)](linear-equations-lec-2-3.html) -[Bernoulli equations (lec 3)](bernoulli-equations-lec-3.html) -[Linear coefficient equations (lec 4)](linear-coefficient-equations-lec-4.html) -[Exact equations (lec 4-5)](exact-equations-lec-4-5.html) -[Second order homogenous linear equations (lec 5-7)](second-order-homogenous-linear-equations-lec-5-7.html) -[Method of undetermined coefficients (lec 8-9)](method-of-undetermined-coefficients-lec-8-9.html) -[Variation of parameters (lec 9-10)](variation-of-parameters-lec-9-10.html) -[Cauchy-Euler equations (lec 10-11)](cauchy-euler-equations-lec-10-11.html) -[Reduction of order (lec 11)](reduction-of-order-lec-11.html) -[Free vibrations (lec 11-12)](free-vibrations-lec-11-12.html) -[Resonance & AM (lec 13-14)](resonance-am-lec-13-14.html) -[Laplace transform (lec 14-16)](laplace-transform-lec-14-16.html) -[Solving IVP's using Laplace transform (lec 17-18)](solving-ivps-using-laplace-transform-lec-17-18.html) -[(Heaviside) Unit step function (lec 18)](heaviside-unit-step-function-lec-18.html) -[Periodic functions (lec 19)](periodic-functions-lec-19.html) -[Convolution (lec 19-20)](convolution-lec-19-20.html) -[Dirak δ-function (lec 21)](dirak-δ-function-lec-21.html) -[Systems of linear equations (lec 21-22)](systems-of-linear-equations-lec-21-22.html) -[Power series (lec 22-25)](power-series-lec-22-25.html) -[Separation of variables & Eigen value problems (lec 26-28)](separation-of-variables-eigen-value-problems-lec-26-28.html) -[Fourier series (lec 28-29)](fourier-series-lec-28-29.html) -[Heat equation (lec 30-33)](heat-equation-lec-30-33.html) -[Wave equation (lec 33-36)](wave-equation-lec-33-36.html) +I have written these notes for myself, I thought it would be cool to share them. These notes may be inaccurate, incomplete, or incoherent. No warranty is expressed or implied. Reader assumes all risk and liabilities. [How to solve any DE, a flow chart](Solve-any-DE.png) (Last updated Oct 1st 2023. Needs revision, but it gives a nice overview.) [Big LT table (.png)](drawings/bigLTtable.png) diff --git a/resources/_gen/assets/scss/css/style.scss_f120a3f402b106f64b18d498afd3d82e.content b/resources/_gen/assets/scss/css/style.scss_f120a3f402b106f64b18d498afd3d82e.content index a485d54..c0c1913 100644 --- a/resources/_gen/assets/scss/css/style.scss_f120a3f402b106f64b18d498afd3d82e.content +++ b/resources/_gen/assets/scss/css/style.scss_f120a3f402b106f64b18d498afd3d82e.content @@ -26,7 +26,87 @@ input[type="submit"] { Bear base styles (Retrieved from official app, all credits belong to Bear Team) */ -html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { +html, +body, +div, +span, +applet, +object, +iframe, +h1, +h2, +h3, +h4, +h5, +h6, +p, +blockquote, +pre, +a, +abbr, +acronym, +address, +big, +cite, +code, +del, +dfn, +em, +img, +ins, +kbd, +q, +s, +samp, +small, +strike, +strong, +sub, +sup, +tt, +var, +b, +u, +i, +center, +dl, +dt, +dd, +ol, +ul, +li, +fieldset, +form, +label, +legend, +table, +caption, +tbody, +tfoot, +thead, +tr, +th, +td, +article, +aside, +canvas, +details, +embed, +figure, +figcaption, +footer, +header, +hgroup, +menu, +nav, +output, +ruby, +section, +summary, +time, +mark, +audio, +video { margin: 0; padding: 0; border: 0; @@ -37,29 +117,48 @@ html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockq html { line-height: 1; } -ol, ul { +ol, +ul { list-style: none; } table { border-collapse: collapse; border-spacing: 0; } -caption, th, td { +caption, +th, +td { text-align: left; font-weight: normal; vertical-align: middle; } -q, blockquote { +q, +blockquote { quotes: none; } -q:before, q:after, blockquote:before, blockquote:after { +q:before, +q:after, +blockquote:before, +blockquote:after { content: ""; content: none; } a img { border: none; } -article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary { +article, +aside, +details, +figcaption, +figure, +footer, +header, +hgroup, +main, +menu, +nav, +section, +summary { display: block; } * { @@ -80,7 +179,8 @@ body { background: var(--background); color: var(--text-base-color); text-rendering: optimizeLegibility; - font-family: "AvenirNext-Regular"; } + font-family: "AvenirNext-Regular"; + position: relative; } a { color: var(--link-text-color); @@ -117,10 +217,14 @@ hr { background-color: #dedede; margin: -1px auto 1.57143em auto; } -ul, ol { +ul, +ol { margin-bottom: .31429em; } -ul ul, ul ol, ol ul, ol ol { +ul ul, +ul ol, +ol ul, +ol ol { margin-bottom: 0px; } ol { @@ -135,11 +239,13 @@ ol li:before { min-width: 1em; margin-right: 0.5em; } -b, strong { +b, +strong { font-family: "Menlo-Regular"; font-weight: bold; } -i, em { +i, +em { font-family: "Menlo-Regular"; font-style: italic; } @@ -151,22 +257,48 @@ code { text-overflow: ellipsis; white-space: nowrap; } -.sf_code_string, .sf_code_selector, .sf_code_attr-name, .sf_code_char, .sf_code_builtin, .sf_code_inserted { +.sf_code_string, +.sf_code_selector, +.sf_code_attr-name, +.sf_code_char, +.sf_code_builtin, +.sf_code_inserted { color: #D33905; } -.sf_code_comment, .sf_code_prolog, .sf_code_doctype, .sf_code_cdata { +.sf_code_comment, +.sf_code_prolog, +.sf_code_doctype, +.sf_code_cdata { color: #838383; } -.sf_code_number, .sf_code_boolean { +.sf_code_number, +.sf_code_boolean { color: #0E73A2; } -.sf_code_keyword, .sf_code_atrule, .sf_code_rule, .sf_code_attr-value, .sf_code_function, .sf_code_class-name, .sf_code_class, .sf_code_regex, .sf_code_important, .sf_code_variable, .sf_code_interpolation { +.sf_code_keyword, +.sf_code_atrule, +.sf_code_rule, +.sf_code_attr-value, +.sf_code_function, +.sf_code_class-name, +.sf_code_class, +.sf_code_regex, +.sf_code_important, +.sf_code_variable, +.sf_code_interpolation { color: #0E73A2; } -.sf_code_property, .sf_code_tag, .sf_code_constant, .sf_code_symbol, .sf_code_deleted { +.sf_code_property, +.sf_code_tag, +.sf_code_constant, +.sf_code_symbol, +.sf_code_deleted { color: #1B00CE; } -.sf_code_macro, .sf_code_entity, .sf_code_operator, .sf_code_url { +.sf_code_macro, +.sf_code_entity, +.sf_code_operator, +.sf_code_url { color: #920448; } .note-wrapper { @@ -367,7 +499,12 @@ svg + ol { * + h4 { margin-top: 2.8em; } -h1, h2, h3, h4, h5, h6 { +h1, +h2, +h3, +h4, +h5, +h6 { position: relative; } h1:before, @@ -458,3 +595,7 @@ li img { .turbolinks-progress-bar { visibility: hidden; } + +@media only screen and (max-width: 460px) { + main .note-wrapper { + padding: 1.57143em 1.1em; } } diff --git a/themes/zettels/assets/css/style.scss b/themes/zettels/assets/css/style.scss index 0ab9b98..61e6bc5 100644 --- a/themes/zettels/assets/css/style.scss +++ b/themes/zettels/assets/css/style.scss @@ -1,4 +1,3 @@ - input { margin: 0; padding: 0; @@ -6,32 +5,113 @@ input { font: inherit; color: inherit; font-size: 100%; - vertical-align: baseline + vertical-align: baseline } *:focus { outline: none; } - + textarea, input[type="search"], input[type="text"], input[type="button"], input[type="submit"] { - -webkit-appearance: none; - border-radius: 0; + -webkit-appearance: none; + border-radius: 0; } + // @todo: class ::selection { - background: var(--selected-text-background-color); - } + background: var(--selected-text-background-color); +} /** Bear base styles (Retrieved from official app, all credits belong to Bear Team) */ -html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { +html, +body, +div, +span, +applet, +object, +iframe, +h1, +h2, +h3, +h4, +h5, +h6, +p, +blockquote, +pre, +a, +abbr, +acronym, +address, +big, +cite, +code, +del, +dfn, +em, +img, +ins, +kbd, +q, +s, +samp, +small, +strike, +strong, +sub, +sup, +tt, +var, +b, +u, +i, +center, +dl, +dt, +dd, +ol, +ul, +li, +fieldset, +form, +label, +legend, +table, +caption, +tbody, +tfoot, +thead, +tr, +th, +td, +article, +aside, +canvas, +details, +embed, +figure, +figcaption, +footer, +header, +hgroup, +menu, +nav, +output, +ruby, +section, +summary, +time, +mark, +audio, +video { margin: 0; padding: 0; border: 0; @@ -44,7 +124,8 @@ html { line-height: 1 } -ol, ul { +ol, +ul { list-style: none } @@ -53,17 +134,23 @@ table { border-spacing: 0 } -caption, th, td { +caption, +th, +td { text-align: left; font-weight: normal; vertical-align: middle } -q, blockquote { +q, +blockquote { quotes: none } -q:before, q:after, blockquote:before, blockquote:after { +q:before, +q:after, +blockquote:before, +blockquote:after { content: ""; content: none } @@ -71,7 +158,20 @@ q:before, q:after, blockquote:before, blockquote:after { a img { border: none } -article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary { + +article, +aside, +details, +figcaption, +figure, +footer, +header, +hgroup, +main, +menu, +nav, +section, +summary { display: block } @@ -97,7 +197,8 @@ body { // @todo: not working color: var(--text-base-color); text-rendering: optimizeLegibility; - font-family: "AvenirNext-Regular" + font-family: "AvenirNext-Regular"; + position: relative; } a { @@ -141,11 +242,15 @@ hr { margin: -1px auto 1.57143em auto } -ul, ol { +ul, +ol { margin-bottom: .31429em; } -ul ul, ul ol, ol ul, ol ol { +ul ul, +ul ol, +ol ul, +ol ol { margin-bottom: 0px } @@ -163,13 +268,15 @@ ol li:before { margin-right: 0.5em } -b, strong { +b, +strong { //font-family: "AvenirNext-Bold"; font-family: "Menlo-Regular"; font-weight: bold; } -i, em { +i, +em { //font-family: "AvenirNext-Italic"; font-family: "Menlo-Regular"; font-style: italic; @@ -185,27 +292,53 @@ code { white-space: nowrap } -.sf_code_string, .sf_code_selector, .sf_code_attr-name, .sf_code_char, .sf_code_builtin, .sf_code_inserted { +.sf_code_string, +.sf_code_selector, +.sf_code_attr-name, +.sf_code_char, +.sf_code_builtin, +.sf_code_inserted { color: #D33905 } -.sf_code_comment, .sf_code_prolog, .sf_code_doctype, .sf_code_cdata { +.sf_code_comment, +.sf_code_prolog, +.sf_code_doctype, +.sf_code_cdata { color: #838383 } -.sf_code_number, .sf_code_boolean { +.sf_code_number, +.sf_code_boolean { color: #0E73A2 } -.sf_code_keyword, .sf_code_atrule, .sf_code_rule, .sf_code_attr-value, .sf_code_function, .sf_code_class-name, .sf_code_class, .sf_code_regex, .sf_code_important, .sf_code_variable, .sf_code_interpolation { +.sf_code_keyword, +.sf_code_atrule, +.sf_code_rule, +.sf_code_attr-value, +.sf_code_function, +.sf_code_class-name, +.sf_code_class, +.sf_code_regex, +.sf_code_important, +.sf_code_variable, +.sf_code_interpolation { color: #0E73A2 } -.sf_code_property, .sf_code_tag, .sf_code_constant, .sf_code_symbol, .sf_code_deleted { +.sf_code_property, +.sf_code_tag, +.sf_code_constant, +.sf_code_symbol, +.sf_code_deleted { color: #1B00CE } -.sf_code_macro, .sf_code_entity, .sf_code_operator, .sf_code_url { +.sf_code_macro, +.sf_code_entity, +.sf_code_operator, +.sf_code_url { color: #920448 } @@ -221,7 +354,7 @@ code { u { text-decoration: underline; - background-image: linear-gradient(to bottom, rgba(0,0,0,0) 50%,var(--accent-text-color) 50%); + background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0) 50%, var(--accent-text-color) 50%); background-repeat: repeat-x; background-size: 2px 2px; background-position: 0 1.05em @@ -339,7 +472,7 @@ blockquote { .address a { color: #545454; - background-image: linear-gradient(to bottom, rgba(0,0,0,0) 50%,#0da35e 50%); + background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0) 50%, #0da35e 50%); background-repeat: repeat-x; background-size: 2px 2px; background-position: 0 1.05em @@ -356,7 +489,7 @@ blockquote { display: inline-block; width: 1em; height: 1em; - border: solid 1px rgba(0,0,0,0.3); + border: solid 1px rgba(0, 0, 0, 0.3); border-radius: 50%; margin-right: 0.1em; position: relative; @@ -415,7 +548,7 @@ img { // Hugo renders footnotes with
tags nested inside
breaking lines -li > p { +li>p { display: inline-block; margin-left: 16px; } @@ -434,25 +567,30 @@ h4 { margin-bottom: .47143em } -* + p, -* + ul, -* + ol, -* + blockquote { +*+p, +*+ul, +*+ol, +*+blockquote { /*margin-top: 1.6em;*/ } -svg + ul, -svg + ol { +svg+ul, +svg+ol { margin-top: 0; } -* + h2, -* + h3, -* + h4 { +*+h2, +*+h3, +*+h4 { margin-top: 2.8em; } -h1, h2, h3, h4, h5, h6 { +h1, +h2, +h3, +h4, +h5, +h6 { position: relative; } @@ -511,9 +649,10 @@ h6:before { content: "#" } -* + table { +*+table { margin-top: 12px; } + table { border-radius: 4px; border: 1px solid var(--separator-color); @@ -569,3 +708,11 @@ li img { .turbolinks-progress-bar { visibility: hidden; } + +@media only screen and (max-width: 460px) { + + // decrease padding of notes when screen width is < 460px + main .note-wrapper { + padding: 1.57143em 1.1em; + } +} \ No newline at end of file diff --git a/themes/zettels/assets/js/search.js b/themes/zettels/assets/js/search.js index 7feeed8..8024e7f 100644 --- a/themes/zettels/assets/js/search.js +++ b/themes/zettels/assets/js/search.js @@ -1,9 +1,14 @@ +// On localhost the root url is /MATH201 +// On sasserisop the root url is /sasserisop +const localhost = false; +const root = localhost ? "" : "/MATH201"; + loadIndex() // Highlight with jQuery // from: https://stackoverflow.com/questions/41533785/how-to-highlight-search-text-in-html-with-the-help-of-js // @todo: This is the only use of jQuery. Find a vanila JS way -jQuery.fn.highlight = function(pat) { +jQuery.fn.highlight = function (pat) { function innerHighlight(node, pat) { @@ -15,16 +20,16 @@ jQuery.fn.highlight = function(pat) { if (pos >= 0) { - var spannode = document.createElement('span'); + var spannode = document.createElement('span'); spannode.className = 'highlighted'; - var middlebit = node.splitText(pos); - var endbit = middlebit.splitText(pat.length); - var middleclone = middlebit.cloneNode(true); + var middlebit = node.splitText(pos); + var endbit = middlebit.splitText(pat.length); + var middleclone = middlebit.cloneNode(true); spannode.appendChild(middleclone); middlebit.parentNode.replaceChild(spannode, middlebit); - skip = 1; + skip = 1; } @@ -41,15 +46,15 @@ jQuery.fn.highlight = function(pat) { } - return this.each(function() { + return this.each(function () { innerHighlight(this, pat.toUpperCase()); }); - }; +}; -jQuery.fn.removeHighlight = function() { +jQuery.fn.removeHighlight = function () { function newNormalize(node) { @@ -71,7 +76,7 @@ jQuery.fn.removeHighlight = function() { if (next == null || next.nodeType != 3) { continue; } var combined_text = child.nodeValue + next.nodeValue; - new_node = node.ownerDocument.createTextNode(combined_text); + new_node = node.ownerDocument.createTextNode(combined_text); node.insertBefore(new_node, child); node.removeChild(child); @@ -83,7 +88,7 @@ jQuery.fn.removeHighlight = function() { } - return this.find("span.highlighted").each(function() { + return this.find("span.highlighted").each(function () { var thisParent = this.parentNode; thisParent.replaceChild(this.firstChild, this); @@ -93,9 +98,9 @@ jQuery.fn.removeHighlight = function() { }; -$(function() { +$(function () { - $('#search-input').bind('keyup change', function(ev) { + $('#search-input').bind('keyup change', function (ev) { // pull in the new value var searchTerm = $(this).val(); @@ -104,64 +109,109 @@ $(function() { $('body').removeHighlight(); // disable highlighting if empty - if ( searchTerm ) { + if (searchTerm) { // highlight the new term - $('body').highlight( searchTerm ); + $('body').highlight(searchTerm); } - }); - }); /// var scrollTop = 0 -document.addEventListener("turbolinks:before-render", function() { - var search_index = document.getElementById("search-results"); - var y = search_index.scrollTop; - scrollTop = y +document.addEventListener("turbolinks:before-render", function () { + var search_index = document.getElementById("search-results"); + var y = search_index.scrollTop; + scrollTop = y + - }) -document.addEventListener("turbolinks:render", function() { +document.addEventListener("turbolinks:render", function () { var search_index = document.getElementById("search-results"); search_index.scrollTop = scrollTop }) - -document.addEventListener("turbolinks:load", function() { + +document.addEventListener("turbolinks:load", function () { setNoteWrapperState() - - + + const current = window.location.href - - var els = document.getElementsByTagName("a"); - for (var i = 0, l = els.length; i < l; i++) { - var el = els[i]; - - if (el.href === current) { - el.classList.add("selected") - } else { - el.classList.remove("selected") - } - } + var els = document.getElementsByTagName("a"); + for (var i = 0, l = els.length; i < l; i++) { + var el = els[i]; + + if (el.href === current) { + el.classList.add("selected") + } else { + el.classList.remove("selected") + } + } }) +// load the lecture note links in homepage +function load_lecture_links() { + // check if links have already been generated first + if ($("p.lecture-link").length == 0) { + fetchJSON(function (response) { + const notes = response; + // for homepage lecture links + const lecture_links = new Map(); + + notes.index.filter(n => !/^Drawing|^20/.test(n.title)).forEach(note => { + // Add lecture notes to a dictionary, and then sort them by lecture number. + // second last character of the title may be first digit of lecture number + const d1 = note.title[note.title.length - 2]; + // find the lecture number, if there is one + if (/\d/.test(d1)) { + // it has a lecture number + // if the third last character is a digit, then the lecture number is 2 digits + const d2 = note.title[note.title.length - 3]; + var lecture_number = /\d/.test(d2) ? Number(d2 + d1) : Number(d1); + // some lecture titles have the same last lecture number + if (lecture_links.has(lecture_number)) { + // prevents two lectures from having the same key + lecture_number += 0.5; + } + lecture_links.set(lecture_number, [note.title, note.permalink]) + } + }); + const sorted_links = new Map([...lecture_links.entries()].sort((a, b) => (a[0] - b[0]))); + sorted_links.forEach(val => { + a_tag = document.createElement('a'); + a_tag.innerText = val[0]; //title + a_tag.href = val[1]; //permalink + p_tag = document.createElement('p'); + p_tag.append(a_tag); + p_tag.className = "lecture-link" + // Add lecture notes before third tag in _index.md + $("#note-wrapper br:nth-of-type(3)").before(p_tag); + }); + }); + } +} function loadIndex() { - fetchJSON(function(response) { - + + fetchJSON(function (response) { const notes = response; const search_results = document.getElementById('search-results'); const tags = document.getElementById('tags'); const current_note = window.location.href; - notes.index.forEach(note => { - const title = '
❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦
+ +{{ partial "content.html" . }} +❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦
Seeing people use these notes and benefitting from it makes me happy, so thanks for sticking around :) and remember to use what you learn for good! And to lead life with honor and integrity and be ethical engineers. Dr. Minev used to always stress the importance of this in his lectures, and I wholeheartedly agree.
- - -{{ end }} + + + +{{ end }} \ No newline at end of file diff --git a/themes/zettels/layouts/partials/search.html b/themes/zettels/layouts/partials/search.html index 33254ae..d2f5444 100644 --- a/themes/zettels/layouts/partials/search.html +++ b/themes/zettels/layouts/partials/search.html @@ -6,130 +6,134 @@ - Focused current note --> + color: var(--text-base-color); + border-bottom: 1px solid var(--separator-color); + border-left: 6px solid var(--background-search); + + } + + #search-results a:first-child:hover, + a:first-child:focus, + .selected { + outline: 0; + background-color: var(--note-table-cell-selected-color); + border-left: 6px solid var(--note-table-cell-ribbon-color) !important; + } + + /* // Reseting default styles inside search component scope */ + #search-results li { + text-indent: 0; + } + + #search-results li:before, + #search-results h1:before, + #search-results h2:before, + #search-results h3:before, + #search-results h4:before, + #search-results h5:before, + #search-results h6:before { + content: ""; + visibility: hidden; + display: none; + } +